LEXIN LX-A4 User manual

Table of Contents
1.Introduction...................................................................................1
2.Package Contents.......................................................................2-3
3.Installation Instructions............................................................3-4
4.General Operation Instructions..................................................5
-Powering On/Off and Charging
-Pairing LX-A4 with a Bluetooth Device
5.Controls and Functions...........................................................6-9
6.Maintenance and Care................................................................9
7.Certification and Safety Approvals......................................9-10
8.Warranty......................................................................................10
9.Waiver and General Release................................................10-11

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1. Introduction
Thank you for choosing the LX-A4 SAFE CHATTER, Motorcycle 4 Rider 1000M
full-duplex stereo Bluetooth wireless helmet headsets, designed for installation into
most open-face, flip-front and full-face style helmets.
With the LX-A4 SAFE CHATTER, you can call hands-free on your Bluetooth mobile
phone, listen to stereo music or voice instructions of GPS navigations by Bluetooth wirelessly,
and have intercom conversations in full duplex with a passenger or multi-pair up to 4
riders in a small group and talk between any 2 of them in a range of 1000M (3,280
feet) distance.
The new LX-A4 SAFE CHATTER includes a wireless remote control. It is what
LEXIN specially designed for the drivers, who have now the option to full control the
Bluetooth interphone without even taking their hands off the grip.
You can now control your Bluetooth interphone with confidence knowing you’re
pushing the right buttons, including Phone/Hang Off or Play/Pause, Volume + / - &
Intercom Rider A , B , C.
Therefore, riding with your interphone is becoming more convenient & safer.
The LX-A4 SAFE CHATTER is compliant with the Bluetooth Specification v3.0
supporting the following profiles: Headset Profile, Hands-Free Profile (HFP),
Advanced Audio Distribution Profile (A2DP). Please check with the manufacturers of
other devices to determine their compatibility with this headset.
Superior audio fidelity has been achieved with our wide-fidelity, non-ported and
ultra-slim helmet speakers. This headset also provides the industry's best combination
of wind and ambient noise reduction with the miniature boom microphone.
Main unit is powered by a rechargeable Lithium Ion/Polymer power cell providing
8-12 hours of use from a full charge.
Please read this user manual carefully before using the headset.

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How it Works
2. Package Contents

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•LX-A4 SAFE CHATTER Main Unit
•Wireless Remote Control
•Slim 5mm Hi-Fi Stereo Speaker
•Boom Microphone for both full-face and half-face style helmet
• Mounting Bracket & Clamp& 3M Tape
• USB Cable
• 3.5mm Audio Cable
•Spacers
• User Manual
3. Installation Instructions
3.1 Insert the back plate of the clamp between the internal padding and external shell
of the helmet, then attach the front bracket in the proper position on the left bottom
edge of the helmet and tighten the clamp with the supplied screws.
Clip Bracket and 3M Tape Bracket

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Note: If the shell of your helmet is a little thick, you could put the Spacer in the
middle of the clamp. Or you may use the sticker style mounting bracket to hold the
main unit on some special large size helmet or the half helmet.
3.2 Locate an area in the nose section just to the left of center to mount the
microphone. If you are installing into an open face helmet, please adjust the direction
of the microphone so that the triangular mark on the microphone is pointing towards
your mouth.
Boom Microphone for Open Face Helmet and Full Helmet
3.3 Place the speakers into the cheek pads. Push the speakers and microphone firmly
against the Velcro pads.
3.4 Push the wires into the gap between the helmet liner and shell.
3.5 Mount the LX-A4 SAFE CHATTER main unit on the bracket, and slide it into the
L-shape hole.
3.6 Mount the LX-A4 main unit on the bracket.

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4. General Operation Instructions
4A. Powering On/Off and Charging
• Power On
Press & hold the POWER Button for about 6 seconds to power on. The
blue LED turns on.
• Power Off
Just short press the Reset Button one time for quick power off, or press and hold the
POWER Button for about 6 seconds to power off. The blue LED will stop
blinking but keep on, then release the button.
• Charge
Plug the micro USB cable into the USB port.The LED turns on red while charging,
and turns off when the main unit and the remote control is fully charged. It takes
about 2.5 hours to be completely charged. Every time in fully charge the remote
control can use for 3 months.
4B. Pairing the LX-A4 with a Bluetooth Device
Before using the LX-A4 SAFE CHATTER Bluetooth headset with any of Bluetooth
devices for the first time, you need to do the pairing operation. It can be paired with
Bluetooth mobile phones, Bluetooth audio devices such as MP3 or GPS, and with
other LX-A4 SAFE CHATTER Bluetooth headsets. This pairing operation is only
required once for each Bluetooth device, and the headset will remain paired with the
devices and automatically connects to the paired devices again when they are within
range.
• Pairing a Mobile Phone
1. Press & hold the POWER Button for about 8 seconds until the LED
flashes red and blue alternately.
2. Search for Bluetooth devices on your mobile phone. The headset will be listed on
your mobile phone as Motor Phone.
3. Enter 0000 for the PIN.
4. Your mobile phone will confirm that pairing is complete. Then only the blue LED
blinks every 5 seconds.
• Pairing a Stereo Bluetooth Adaptor
1. Turn on audio source and prepare Stereo Bluetooth Adaptor for pairing
2. Put LX-A4 SAFE CHATTER main unit in Bluetooth pairing mode (see above)
3. Turn on or plug in Stereo Bluetooth Adaptor
4. Audio source will automatically start playing though LX-A4 SAFE CHATTER
main unit when pairing is complete
• Pairing Bluetooth GPS Navigation
1. You can listen to Bluetooth voice instructions from a Bluetooth GPS navigation.
2. The paring procedure is the same with the procedure of “Pairing Mobile Phone”.
3. Please refer to the manual of the Bluetooth GPS navigation for details.

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5. Controls and Functions
5.1 Volume and Music Control
5.1 Volume Adjustment
You can easily adjust the volume by short pressing Volume - & Volume + Button.
You will hear a beep when the volume reaches maximum or minimum level.
5.2 Safe Mobile Phone Calls - Incoming and Outgoing
5.2.1 Answer incoming call:
5.2.1. When you have an incoming call, you can wait 3-5 seconds and the headset will
answer the call automatically. Or you can simply short press the Phone/Play Button to
answer the call.
5.2.2 Reject incoming call：
press & hold the Phone/Play Button for 2 seconds.
5.2.3 End active phone call：
short press the Phone/Play Button
5.2.5 Last phone call number redial：
press & hold the Phone/Play Button for 2-3 seconds.
Note: In some cases (e.g. high-power RF radio influence or metal blocking), the
headset might disconnect from the mobile phone. Please short press the Power button
to reconnect.
5.3 Bluetooth Intercom Talk
5.3.1 Pairing with the other LX-A4 headsets for Intercom Conversation
The LX-A4 SAFE CHATTER can be paired with up to three other headsets for a
medium group Bluetooth Intercom conversation.
1) Pairing two LX-A4 headsets to talk
1.Start with power off status, press and hold Power Button on both headsets for 6
seconds until the LED flashes red and blue alternately.
2. Short press the power button on either headset (A or B) and wait until the LEDs of
both headsets turn to blue blinking and intercom connection is automatically
established. (Headset A is paired with Headset B)
3. Press the power button to start or quit the Intercom. Wait three to five seconds for
the units to connect when starting a conversation. When in an Intercom conversation
you can see both blue and red led blinks simultaneously.
2) Paring four LX-A4 headsets to talk
The LX-A4 SAFE CHATTER can be paired with up to three other headsets for a
medium group Bluetooth Intercom conversation.
1. Turn on the two headsets (A and B) that you would like to pair with each other.
2. Press and hold the RIDER B Button of the Headsets A for 6 seconds until the LED
flashes red and blue alternately. Meanwhile, press and hold the RIDER A Button of
the Headsets B for 6 seconds until the LED flashes red and blue alternately.

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3. Short press the RIDER A Button of Headset B or RIDER B Button of the Headsets
A and wait until the LEDs of both headsets turn to blue blinking and intercom
connection is automatically established. (Headset A is paired with Headset B)
4. You can make other pairings between the headset A and C, the headset A and D,
then the headsets B and C, the headsets B and D, then the headset C and D by
following the same procedure as above.
To get the overall pairing details, please refer to the following table:
INTERPHONE
PAIRING
BUTTON
STATUS
BEFORE
PAIRING
WHEN RED AND
BLUE LED FLASH
ON BOTH UNITS,
SHORT PRESS
BELOW BUTTON
ON LEFT
HEADSET
<---pair each
other in 5-9
seconds--->
INTERPHONE
PAIRING
BUTTON
STATUS
BEFORE
PAIRING
Headset A
B
powered on
B
<---pairing--->
Headset B
A
powered on
Headset A
C
powered on
C
<---pairing--->
Headset C
A
powered on
Headset A
A
powered on
A
<---pairing--->
Headset D
A
powered on
Headset B
C
powered on
C
<---pairing--->
Headset C
B
powered on
Headset B
B
powered on
B
<---pairing--->
Headset D
B
powered on
Headset C
C
powered on
C
<---pairing--->
Headset D
C
powered on
5. Four headsets are completely multi-paired as a medium group and switch to talk
between any 2 of them in a range of 1000M (3,280 feet) distance.
5.3.2 Start intercom talk
Short press button Rider A or Rider B or Rider C to start conversation between any 2
riders.
5.3.3 Disconnect the intercom talk
To terminate an intercom conversation between any 2 riders, short press button Rider
A or Rider B or Rider C.
Note: If you have purchased a LX-R6 Dual Pack, the 2 units are pre-paired already,
you can simply press the power button to initiate or quit the intercom talking with the
other.
Note: (There is no Rider D Button on the headset, so for Headsets A, we use Rider A
Button as Rider D Button, and so forth.)
Note: Please make sure that during the pairing procedure, only two headsets are in
power on status, and the other two ones are in power off status.
Important Note: Please make the pairing only by pressing the Button on the main unit,
but not pressing the Buttons on the wireless remote control.

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Important Note: When you are operating the intercom functions by pressing the Rider
A, B, C button on the wireless remote control, please don’t press the same button
repeatedly, otherwise it will confuse the main unit. As the button function of the
wireless remote control is the same as the main unit, you can use it directly without
pairing. Please be patient to wait for the main unit’s reaction for 1-5 seconds,
remember that one operation, one pressing.
Note:
1.When you try to start an intercom conversation with an Intercom rider who is
already having an intercom conversation or a mobile phone call with another person,
you can’t make it and will hear low tone double beep as a busy signal. In this case,
you have to try again later.
2. If your Intercom rider goes out of range while having an intercom conversation,
you may hear static noise and eventually the intercom will be disconnected. In this
case, the LX-A4 SAFE CHATTER automatically tries to reconnect the intercom every
8 seconds and you will hear high tone double beeps until the intercom is reestablished.
If you don’t want to make a re-connection, short press the Rider A or Rider B or Rider
C Button to stop the attempt.
5.4 Stereo Music
You can listen to stereo music in either way: by Bluetooth wireless stereo or with the
enclosed stereo audio cable.
• By Bluetooth Wireless Stereo
The Bluetooth audio device must be paired with the LX-A4 SAFE CHATTER by
following the Bluetooth Audio Device Pairing instructions described in the previous
chapter. The LX-A4 SAFE CHATTER supports the Advanced Audio Distribution
Profile (A2DP), so if your Bluetooth audio device also supports the A2DP, you can
use the LX-A4 SAFE CHATTER to remotely control music playback. You may not
only adjust the volume but also use the functions such as play & pause.
- Press Volume + or Volume – Button on the main unit or on the wireless remote
control to adjust the volume.
- Press Phone/Play Button on the main unit or on the wireless remote control to
play/pause the music.
• By Stereo Audio Cable
Plug your stereo MP3 player directly to the LX-A4 SAFE CHATTER by using the
enclosed 3.5mm audio cable. You may adjust the volume and control the music
playback on the MP3 player.
5.5 Function Priority
The LX-A4 SAFE CHATTER operates in the following order of priority:
1. Mobile phone (highest)
2. Intercom
3. Bluetooth stereo music, FM radio (lowest)
A lower-priority function is always interrupted by a higher-priority function. For
example, stereo music is interrupted by an Intercom call, and Intercom conversation is
interrupted by an incoming mobile phone call.