Overview of JVC KWAVX840

Overview: The JVC KW-AVX840 double-DIN multimedia unit includes a built-in AM/FM tuner and DVD/CD player, with integrated 7" monitor. The KW-AVX840 is also equipped with a rear-panel USB port and supports both Bluetooth communication (with included adapter) and iPod audio/video playback (via optional cable). In addition, the in-dash multimedia receiver is Satellite Radio and HD Radio ready (requires optional tuners). The JVC KW-AVX840 also lets you keep your factory steering wheel remote control (via optional adapter).

Display Features

2-DIN Chassis: The JVC KW-AVX840 has a 2-DIN chassis (also known as Double DIN), and will fit in many vehicles with a large dash opening. The unit can be ISO-mounted using factory brackets, or Euro-mounted using the supplied mounting sleeve.

Detachable Motorized 7" TFT LCD Touchscreen Monitor: The KW-AVX840 features a motorized 7" TFT Active Matrix, 16:9 touch-screen monitor with an adjustable viewing angle. The pixel resolution of the display is 800 horizontal x 480 vertical x RGB (1,152,000 pixels total). The LCD serves as a video monitor, system information display and touch-screen control panel. The motorized display can be tilted (up) to one of seven angles. You can detach the touch-screen LCD monitor and place it in its supplied soft face case to prevent theft.
Gesture Control: Gesture Control lets you operate certain functions of the KW-AVX840 by making specific gesture commands on the unit's touchscreen. You can adjust the volume of the multimedia receiver by making a circular motion with your finger on the unit's touchscreen. You can also skip tracks by swiping the screen horizontally (left or right) with  your finger.
Proximity Sensor Touchscreen Control: The JVC KW-AVX840 features proximity sensors which allow the LCD touchscreen to illuminate when you move your hand close to the headunit's front-panel sensors or tap the touchscreen. The LCD touchscreen turns off when there is no operation for a preset time period. You can set the unit's motion sensitivity to Low or High.
Display Design: You can change the color of  background, text, touchscreen buttons, and hard-key buttons. The color of the background, text, and buttons can be changed independently from one another.

• Background: The unit's background color can be changed to one of eight preset colors - blue, light blue, red, green, yellow, orange, violet, or white. You can also create a custom color using a combination (0-31) of red, green, and blue.
• Text: The unit's onscreen text can be changed to one of seven preset colors - blue, red, green, yellow, orange, violet, or white. You can also create a custom color using a combination (0-31) of red, green, and blue.
• Buttons: The unit's touchscreen and hard-key button color can be changed to one of eight preset colors - blue, light blue, red, green, yellow, orange, violet, or white. You can also choose to have the unit constantly scroll through all eight preset color. In addition, you can create a custom color using a combination (0-31) of red, green, and blue.

Custom Background Image: While playing a video or JPEG file, you can capture an image and use the captured image as your background. When using a JPEG file as the background, make sure that the resolution is 800 x 600 pixels. The color of the captured image may look different from that of the actual scene.

Display Adjustment: You can adjust the brightness and black level of the unit's onscreen display. You can also adjust the contrast, color, tint, and detail level during video playback. The adjustment level for each setting is -15 to +15.
Selectable Aspect Modes: You can choose from four aspect modes for the in-dash display:

• Regular: For 4:3 source material, 4:3 and 16:9 pictures display with black bars on either side (16:9 images are compressed).
• Full: Expands 4:3 pictures horizontally to fill the entire width of the screen, distorting the picture slightly but retaining full image height.
• Panorama: For viewing 4:3 pictures naturally on the unit's wide-screen display.
• Auto: The correct aspect mode is automatically chosen based on the incoming signal.

Adjustable Dimmer: When 12 volts is applied to the illumination lead (orange/white) and the dimmer set to Auto, the display will dim automatically when you turn on your vehicle's exterior or interior lights. The dimmer can also be set to Off (normal brightness at all times), On (display is always dimmed), or Dimmer Time Set (you program the time for the dimmer to turn off an on). The unit also features 3 dimmer levels to choose from - Bright, Middle, or Dark.
Parking Brake Detection: To prevent the displaying of video while the vehicle is in motion, the parking brake wire (light green) attached to the rear-chassis must be connected to your vehicle's parking brake detection circuit. While the vehicle is in motion (parking brake off), you can still view all of the other displays and menus.
Multi-Language Menu: There are ten options for the menu language; English, Spanish, French, German, Italian, Dutch, Portuguese, Swedish, Danish, and Russian.

Audio Section

24 Bit D/A Converter: The JVC KW-AVX840 utilizes a 24-bit digital to analog converter for superior sound quality.
MOSFET Amplifier: The KW-AVX840 is equipped with a MOSFET amplifier. Compared to conventional power supplies, the MOSFET amplification circuit is smaller and more efficient, and it delivers increased power with less distortion and absolutely zero on/off switching noise. More power means louder and cleaner music at higher volumes because you're not pushing the limits of the amplification circuit.
CEA2006 Compliant: The power specifications for the KW-AVX840 are compliant with the CEA2006 Mobile Amplifier Power Testing and Measurement standards from the Consumer Electronics Association (CEA). These standards were developed as a way to equitably compare power specs from model to model and between manufacturers. The power output specs for the KW-AVX840 are as follows:

• CEA2006 Specs: 20 watts RMS x 4 channels (at 4 ohms, 20Hz-20kHz, 1% THD-N)
• Maximum Power Output: 50 watts x 4 channels (200 total watts)

Amplifier Gain Control: When you are using the KW-AVX840 with factory speakers (or those rated to less than 50 watts peak), the Amplifier Gain Control can limit the amount of power being sent to those speakers. When the Amp Gain Control is set to low, the volume control ranges from 0 (minimum) to 30 (maximum). When using speakers rated higher than 50 watts peak, you can set the Amp Gain Control to high, and the volume control will range from 0 to 50. The internal amp can also be turned off when all the speakers are powered by outboard amplifiers.
5ch/4V Preamp Outputs: The KW-AVX840 is equipped with 5ch/4.0V preamp outputs (Front, Rear, Subwoofer). The front and rear preamp outputs allow fader control, while the subwoofer preamp output is non-fading.
Subwoofer Controls: You can adjust the KW-AVX840's subwoofer level (-50 to +10) independently from the headunit's main volume control for added bass volume. You can also adjust the subwoofer phase between Normal or Reverse to blend the bass sound better with the rest of the speakers in  your system.
Built-in Crossovers: The JVC KW-AVX840 features a built-in high-pass filter for the unit's front & rear speakers, and a low-pass filter for the unit's subwoofer output.

• High-Pass Filter: You can activate a variable high-pass filter (40, 60, 80, 100, 120, 150, 180, 220 Hz or Through) for the unit's front & rear channels (speaker- or preamp-level), so low frequency signals are cut off from your system's front & rear speakers. The front & rear channel's high-pass filters can be set independently of one another.
• Low-Pass Filter: The unit's subwoofer preamp output features a low-pass filter. In order to prevent high-frequencies from being sent to your system's subwoofers, you can set the cutoff frequency of the low-pass filter to 50, 60, 80, 100, 120 Hz or Through.

Speaker Select: You can select which type & size of speaker you have connected to the headunit. Choose from Standard (OEM/Factory), Narrow (4"/5"), Middle (6"/5x7"/6x8"), Wide (6x9").
Pro EQ: The KW-AVX840 is equipped with JVC's Pro EQ. The integrated equalizer offers 8 preset sound modes (Flat, Natural, Dynamic, Vocal Boost, Bass Boost, Vibrant, and User) suitable for the music genre of your choice. The User mode allows you to manually adjust the headunit's 3-band parametric EQ (Frequency, Level, and Q-Factor).

Tone	Pro EQ
	Frequency	Level	Q
Bass	60, 80, 100, 150 Hz	+/- 10 dB (-5 to +5)	1.0, 1.25, 1.5, 2.0
Midrange	0.5, 1.0, 1.5, 2.0 kHz	+/- 10 dB (-5 to +5)	1.0, 2.0
Treble	10.0, 12.5, 15.0, 17.5 khz	+/- 10 dB (-5 to +5)	Fixed

Note: The audio adjustments are memorized for each source until you adjust the sound again.

Loud (Loudness): This feature boosts low and high frequencies to produce a well-balanced sound at a low volume level. You can set the Loudness to On or Off.
Dynamic Range Compression: This function reduces a Dolby Digital soundtrack's dynamic range so you can hear quieter dialog without being overwhelmed by loud sections. You can choose a setting of Auto or On.
Volume Adjust: The input level of each source (other than FM) is adjustable relative to the FM radio volume, so there isn't a significant volume difference when changing sources. Each source is individually adjustable from -15 to +6.
Key-Touch Tone: The in-dash headunit provides an audible beep to confirm button operation. This function can be turned On or Off.

Radio Functions

AM/FM Tuner: The JVC KW-AVX840  features a built-in AM/FM tuner with manual, seek, and preset tuning.
RDS: The Radio Data System (RDS) feature displays radio broadcast information such as artist, title, and album when listening to compatible AM/FM stations,
Preset Tuning: You can store a total of 18 FM stations presets and 6 AM station presets. The radio allows you to set your AM/FM stations manually or automatically.
IF Filter: You can also switch the tuner's IF filter to Wide or Auto to increase/decrease the sensitivity.
Local: You can select this function to only tune in stations with sufficient signal strength.
Mono Mode: You can activate the monaural mode to improve FM reception, when a station is week. The stereo effect will be lost.
US/European Tuning: You can set the built-in AM/FM tuner between US standard and European tuning spacing.
HD Radio: The JVC KW-AVX840 supports HD Radio when the optional JVC HD Radio tuner box (105KTHD300, sold separately) is connected to the receiver's CD changer port on the rear of the unit. HD Radio Technology can deliver high-quality digital sound. AM digital will have FM-like quality in stereo, while FM digital will have CD-like quality with static free and clear reception. In addition, AM/FM digital stations can offer text and data such as artist names and song titles. Many HD Radio stations also offer more than one channel of programming. This service is called multicasting. When this optional HD Radio tuner box is connected to the KW-AVX840, you will still be able to receive conventional analog AM/FM broadcasts.

Note: Right now there are about 2,000 radio stations broadcasting using digital HD Radio technology in the U.S. To find HD Radio stations in your area, visit the HD Radio website (HDRadio.com).

Satellite Radio Ready: There are several options for connecting an optional XM or SIRIUS Satellite Radio receiver to this receiver:

• SIRIUS: The JVC KW-AVX840 is compatible with the SiriusConnect Universal Tuner and Plug & Play Dock.
  • SiriusConnect Tuner: Connect the optional SC-C1 SiriusConnect vehicle tuner (item number 607SCC1) and the JVC KS-SRA100 SIRIUS adapter (item number 105KSRA100) - package # 700SIRJVC1, sold separately.
  • SiriusConnect Dock: Select dock-and-play and portable SIRIUS radios can be controlled using the JVC KS-SRA100 SIRIUS adapter (item number 105KSRA100, sold separately) and the SC-VDOC1 dock (item number 607SCVDOC1, sold separately).
• XM: A portable XM Satellite Radio receiver can be connected to the headunit via the front-panel auxiliary input or a JVC auxiliary input adapter, such as the KS-U57 or KS-U58 (sold separately).

Note: A subscription is also required to receive satellite radio programming from SIRIUS or XM.

Disc Playback

Motorized Front-Panel: The JVC KW-AVX840's monitor electronically slides down for loading or ejecting a disc.
Disc Compatibility: The JVC KW-AVX840 supports the playback of the following disc types: DVD-Video, DVD-R/RW, DVD+R/RW, CD-Audio, CD-R/RW, and Video CD.
MP3/WMA Playback: The KW-AVX840 can play MP3 (bitrate: 32-320 kbps), WMA (bitrate: 32-320 kbps), WAV (sampling freq: 44.1kHz) audio files recorded onto DVD-R/RW, DVD+R/RW, and CD-R/RW discs. MP3/WMA/WAV files must be formatted in ISO 9660 level or level 2, Romeo, or Joliet. The headunit can recognize a total of 5,000 files and 250 folders (a maximum of 999 files per folder). This unit will recognize a total of 25 characters for file/folder names. The KW-AVX840 can display ID3 Tags (ver. 1.0/1.1/2.2/2.3/2.4) for MP3 files, as well as WAV/WMA Tag information.
MPEG/JPEG Playback:  The JVC KW-AVX840 supports playback of JPEG still-image files (resolution: 32x32 - 8192x7680) and MPEG1/2 video files (maximum bit-rate: 4Mbps) recorded onto DVD-R/RW, DVD+R/RW, and CD-R/RW discs.
DivX Certified: The KW-AVX840 is DivX Certified to play DivX video files, including premium content.
Disc Resume: If you change the source, playback also stops (without ejecting the disc). Next time you select CD for the playback source, the disc will start from where it has been stopped previously.
Disc Protection: You can set the multimedia headunit to prohibit disc ejection.
Auto Reload: If an ejected disc is not removed within 15 seconds, the disc is automatically inserted again into the loading slot to protect it from dust; playback starts automatically.
Mounting: For proper disc playback you must install the unit within 30-degrees of horizontal.

USB/iPod Connectivity

USB Port: The JVC KW-AVX840 features a rear-panel USB port on a 38" pigtail. This allows playback of MP3 (bitrate: 32-320 kbps), WMA (bitrate: 32-320 kbps), WAV (sampling freq: 44.1 kHz) audio files; JPEG (resolution: 32x32 - 8192x7680) still image files; and MPEG1/2 (maximum bitrate: 4 Mbps) video files stored on a USB mass storage device. For the unit to recognize the USB medium, it must be specified as a mass storage device formatted using FAT 12/16/32. The headunit can recognize a total of 5,000 files and 250 folders (a maximum of 999 files per folder). This unit will recognize a total of 50 characters for file/folder names. The KW-AVX840 can display ID3 Tags (ver. 1.0/1.1/2.2/2.3/2.4) for MP3 files, as well as WAV/WMA Tag information.

Note: This unit cannot recognize a USB device whose rating is other than 5V and exceeds 1A. You cannot connect a computer or portable HDD to the USB port of this unit.

iPod/iPhone AV Playback: The optional JVC KS-U30 USB A/V Cable For iPod/iPhone (105KSU30, sold separately) allows you to playback and control audio/video from your iPod or iPhone on this JVC multimedia headunit. The cable features a proprietary Apple iPod dock connector on one end and a male composite video and male stereo audio RCA connectors on other end along with a USB type-A connector. The cable plugs into the unit's rear-panel AV input and USB port. To playback video, the KW-AVX840's rear-panel Video Input must be set to "iPod" in the unit's menu.

Note: You can also connect your iPod's USB/Docking cable to the unit's USB port for audio only playback from your iPod/iPhone. The headunit's rear-panel Audio Input must be set to "AV-IN", not "iPod".

iPod/iPhone DAC Bypass: Because the JVC KW-AVX840 uses its USB connection for audio & control transfer, your iPod/iPhone's stored music is loaded instantly to the headunit and sound quality is maximized through the headunit's 24-bit D/A converter, allowing for a Signal-to-Noise ratio up to 95dB.

Note: You can also choose to transfer the audio from your iPod/iPhone to the JVC KW-AVX60 via an analog connection using the KS-U30 USB A/V Cable's stereo RCA connector. This allows you to listen to DRM protected audio files. The headunit's rear-panel Audio Input must be set to "iPod".

iPod/iPhone Control: You can choose to control your iPod/iPhone from the JVC headunit or from your iPod/iPhone's its touchscreen or clickwheel.

• Music Browsing: From the headunit's front-panel controls you can search for music by Playlist, Artist, Album, Song, Podcast, Genre, Composer, and Audiobook. You can search video by Playlist, Movies, Music Videos, TV Shows, and Video Podcasts. Once a Playlist or Category is selected, the content is listed in alphabetical order.
• Repeat & Random: The KW-AVX840 also supports Repeat (file/all) and Random (album/all) playback functions of your iPod/iPhone.

Note: You can listen to apps stored on your iPod touch or iPhone through the JVC headunit when controlling the iPod/iPhone via its touchscreen (cannot access apps via Headunit control mode).

iPod/iPhone Display: The KW-AVX840 will display your iPod/iPhone's music file information of your stored music, regardless of control mode. The headunit will display Track number, Elapsed playing time, Artist name, Song title, Album label, and Album Art.

Note: Your iPod/iPhone's downloaded apps will not display on the unit's LCD monitor.

iPod/iPhone Charging: While connected and the ignition switch is set to ACC or ON, the headunit's USB connection will power and charge your iPod/iPhone.

Note: If your iPod/iPhone has no initial battery charge, then the unit will not recognize it.

iPod/iPhone Compatibility Chart: The JVC KW-AVX840 is "Made for iPod/iPhone" compatible and supports the following iPod/iPhone model features (as of March 2011):

iPod/iPhone Model	Generation	Tested Version	Media Type		Control Type		Display Type		Charge
			Audio	Video	Headunit	iPod/iPhone	Song/Artist Text	Track Info
dock connector	3rd	N/A	N	N	N	N	N	N	N
clickwheel color	4th	N/A	N	N	N	N	N	N	N
mini	1st	N/A	N	N	N	N	N	N	N
	2nd	N/A	N	N	N	N	N	N	N
video	5th	1.3	Y	Y	Y	N	Y	Y	Y
classic	80GB	1.1.2	Y	Y	Y	Y	Y	Y	Y
	120GB	2.0.1	Y	Y	Y	Y	Y	Y	Y
	160GB	2.0.4	Y	Y	Y	Y	Y	Y	Y
nano	1st	1.3.1	Y	N	Y	N	Y	Y	Y
	2nd	1.1.3	Y	N	Y	Y	Y	Y	Y
	3rd	1.1.3	Y	Y	Y	Y	Y	Y	Y
	4th	1.0.4	Y	Y	Y	Y	Y	Y	Y
	5th	1.0.2	Y	Y	Y	Y	Y	Y	Y
	6th	1.0 PC	Y	N	Y	Y	Y	Y	Y
touch	1st	2.2.1	Y	Y	Y	Y	Y	Y	Y
	2nd	4.2.1	Y	Y	Y	Y	Y	Y	Y
	3rd	4.2.1	Y	Y	Y	Y	Y	Y	Y
	4th	4.2.1	Y	Y	Y	Y	Y	Y	Y
iPhone	2G	3.1.2	Y	Y	Y	Y	Y	Y	Y
	3G	3.1.2	Y	Y	Y	Y	Y	Y	Y
	3GS	3.1.2	Y	Y	Y	Y	Y	Y	Y
	4	4.0	Y	Y	Y	Y	Y	Y	Y

Note: Apple iPod/iPhone software updates may change functionality results. If you download a newer software version, you may need to reset the headunit and your iPod/iPhone to regain functionality. If this doesn't work, you may need to revert to the older software version or wait until a newer software update is available.

iPhone External Mode: The JVC multimedia in-dash receiver features an iPhone External Mode which lets you enjoy audio/video content from downloaded Apps (such as Pandora, Netflix, YouTube, etc..) on your Apple iPhone. Using the JVC KSU-30 cable (sold separately), you can view video and listen to audio from downloaded Apps on your iPhone through the JVC KW-AVX840. This mode offers no control of your iPhone. You will continue to use your iPhone's touchscreen to navigate your Apps.

Note: Access to your iPhone's downloaded application will depend on the availability of a cellular and/or WiFi network for purposes of allowing your iPhone to connect to the Internet.

MotionX-GPS Drive Navigation Ready: Motionx-GPS Drive turns your iPhone 4 (iOS 4.0 or later) and the JVC KW-AVX840 into a personal navigation device for your vehicle. Providing full navigation features and song playback control from your iPhone 4, MotioX-GPS Drive also displays its map data on the connected JVC multimedia receiver's widescreen monitor (via the JVC KSU-30 cable, sold separately). Your iPhone 4 displays a choice of MotionX-GPS Driver's feature/menu screens as a secondary display (for passenger), while continuing to show the map on the JVC receiver. It even works simultaneously with iPhone 4 song playback by muting or pausing music, then restoring your volume during voice guidance through your car speakers. The MotionX-GPS Drive Navigation application covers the United States & Canada.

Note: MotionX-GPS Drive App purchase ($0.99) and download required for your iPhone through iTunes. $2.99 per month subscription fee or $19.99 per year is required for Voice Guidance feature. The MotionX-GPS Drive App is compatible with iPhone 3G, 3GS and 4, but only the iPhone 4 can show the map on the KW-AVX840's display.

AV Connections

Audio/Video Output (with Dual Zone): The rear-panel Audio/Video Output consists of a  composite video jack and a 3.5mm stereo minijack that allows you to connect an optional external monitor and a headphone system in the rear of the vehicle. When listening to the unit's AM/FM tuner, you can set the A/V output to Disc, USB, iPod, AV-IN, or Off. When listening to any other source, you can only set the A/V output to AV-IN. You can choose one of the following monitor types for the output to the external monitor(s):

• 16:9: Select this when the aspect ratio of your monitor is 16:9.
• 4:3 Letter Box: Select this when the aspect ratio of your monitor is 4:3, when viewing a widescreen picture black bars appear on the top and bottom of the screen.
• 4:3 Pan Scan: Select this when the aspect ratio of your monitor is 4:3, when viewing a widescreen picture, the black bars do not appear; however, the left and right edges of the picture will not be shown on screen.

Audio/Video Input: The rear-panel audio/video input consists of left and right RCA audio jacks and an RCA composite video jack, allowing you to connect external equipment to this headunit. The audio/video input can be set to one of the following modes:

• AV IN: Choose when connecting an A/V component like a game system.
• iPod Video: Select when connecting your iPod using the optional USB/Video cable (105KSU30, sold separately).

Camera In: The rear-panel Camera input consists of a composite video connector which allows you to connect an optional rear-view camera (105KVCM1K, sold separately). The unit features a reverse gear signal wire, that when hooked up will switch the KW-AVX840's display to the rear-view camera input.
Optional Input Adapter: An optional JVC Line Input Adapter (105KSU57 or 257KSU58, both sold separately) may be used to provide an additional auxiliary audio input on this unit. This feature allows you to connect a portable audio player, such as a portable MP3 player, to this unit as an additional audio source. The adapter connects to the J-port on this unit.
RGB Terminal: You can connect an optional add-on navigation unit (sold separately) to the headunit's RGB input terminal so that you can view the navigation map on the headunit's touchscreen monitor.

Bluetooth Communication

USB Bluetooth Adapter: The JVC KW-AVX840 comes supplied with a USB Bluetooth Adapter (KS-UBT1) which is pre-installed into the headunit's front-panel USB input (hidden behind the detachable face-plate), making KW-AVX840 Bluetooth 2.0 certified. The KW-AVX840 supports Bluetooth hands-free communication and wireless audio streaming.

Note: The unit's hidden front-panel USB port is designed for the included Bluetooth adapter only. It does not support connection of a USB mass storage class device, digital audio player, or iPod/iPhone.

Bluetooth Technology: Bluetooth is a two-way wireless communication system allowing you to make and receive phone calls wirelessly from your Bluetooth enabled mobile phone, as well as wirelessly stream audio from your Bluetooth enabled portable music player using the JVC in-dash multimedia receiver. Bluetooth wireless technology operates on a 2.4GHZ frequency band within a range of approximately 10 meters (about 33 feet).
Bluetooth Profiles: The JVC KW-AVX840 supports the following Bluetooth profiles:

• HFP (Hands-Free Profile): Hands-free communication with your Bluetooth enabled cellular phone in the vehicle (incoming/outgoing calls supported).
• OPP (Object Push Profile): Phonebook transfer from your Bluetooth enabled mobile phone to the headunit.
• PBAP (Phone Book Access Profile): Phonebook access from your Bluetooth enabled cell-phone to the headunit.
• A2DP (Advanced Audio Distribution Profile): Music streaming from your Bluetooth enabled phone or audio player to the headunit.
• AVRCP (Audio/Video Remote Control Profile): Basic music playback control of your Bluetooth enabled phone or audio player from the headunit.

Pairing: Your Bluetooth enabled mobile phone or digital audio player must be paired with KW-AVX840 before hands-free & wireless operation. You can register up to five Bluetooth enabled devices with the JVC headunit. You can keep two phones connected at all times (only one can be used during a call).

Note: Not all Bluetooth devices will be compatible. Visit JVC's website for a complete list of compatible Bluetooth enabled devices.

Bluetooth Hands-Free Communication: The multimedia headunit supports Bluetooth hands-free communication for your Bluetooth enabled mobile phone. The controls of KW-AVX840 can be used to dial a number, answer an in-coming call, or end a call. The unit also includes an external microphone (with mounting bracket) featuring adjustable gain, so you can carry on your side of the conversation while listening to the caller through your vehicles speakers (front or all).
External Microphone: The JVC Aresenal KW-AVX840 includes an external microphone to carry on your side of your phone conversation and voice command dialing. The external wired microphone offers improved audio quality versus an integrated microphone, so you can be heard easier over noisy traffic and road noise. You can adjust the level of the microphone without affecting the other sources. The external microphone features an attached 10' cable terminated by a right-angle 3.5mm connector which plugs into the mic input on the rear-panel of the headunit. The microphone offers an integrated mounting bracket which can be clipped to your vehicle's sun-visor or taped to your dash. The external microphone measures 0.515" (diameter) x 1.485" (depth).

Note: This unit does not offer an integrated front-panel microphone.

Answering A Call: When a call comes in, a ring-tone will be heard through your vehicle's speaker, the headunit's display will flash, and the caller's name or phone number will be displayed. You can answer the call from KW-AVX840's touchscreen or setup the headunit to automatically answer the incoming call.
Dialing A Number: Using KW-AVX840, you can dial a phone number in one of the following ways:

• Entering a Phone Number: Allows you to directly dial a phone number up to 32 digits from the headunit's touchscreen.
• Speed (Preset) Dialing: Allows you to register up to 6 phone numbers for quick dialing. The preset numbers can be accessed from the headunit's touchscreen.
• Phone Book: You can dial by using the downloaded phone book. You can download phone book data from your cell phone to KW-AVX840. Up to 5,000 numbers can be stored for each registered cell phone. Each number can be up to 32 digits long.
• Call Log: The Call Log is a list of calls that have originated from and were received by this unit that you can dial. You can select Outgoing, Incoming, or Missed calls (up to 50 each).
• Voice Dialing: If your mobile phone supports voice recognition, then you can dial out by voice command. Simply speak into the included microphone. 

SMS: You can wirelessly download the short message (SMS) arrived at your cell-phone so that is can be read on the Bluetooth connected JVC headunit. Your cell-phone must support SMS for this feature to function. The SMS downloaded to this unit is cleared when this unit is turned off.

Note: You cannot send text messages using this unit (read only).

Private/Hands-Free Mode: During a conversation, you can switch between the Private Mode (talking directly on your cell phone) and the Hands Free Mode. 
Bluetooth Audio Streaming: The included Bluetooth adapter also allows audio playback and control of a Bluetooth enabled audio player through KW-AVX840. The KW-AVX840 will be able to control basic playback features such as Play/Pause, Track/Folder Select, Fast Forward/Reverse, and Skip Next/Previous.

Remote Control

Optional Wireless Remote: The JVC KW-AVX840 is wireless remote controller ready and supports the JVC RM-RK252P IR wireless remote control (sold separately).
Steering Wheel Remote Compatibility: The headunit features an OEM steering wheel remote control input wire (blue/yellow) within the included wiring harness that lets you keep your vehicle's factory radio steering wheel remote controls when used with the optional PAC SWI-JACK Steering Wheel Control Interface Adapter (127SWIJACK, sold separately); or the optional Metra ASWC Steering Wheel Control Interface Adapter (120ASWC, sold separately).