LEXIN GTX Bluetooth Intercom Headset User Manual

Introduction

This manual provides instructions for the LEXIN GTX Bluetooth Intercom Headset.

Index

• Features
• Product Contents
• Installation Instructions
• Basic Operation
• Power & Battery
• Bluetooth Pairing
• Call Handling
• Voice Assistant
• Volume & Music Control
• Audio Multitasking
• Intercom Pairing
• Generic Functions

Features

• Bluetooth 5.0
• GPS Navigation Support
• HiFi Audio Support
• USB-C Fast Charging
• Hands-free Calling
• Intelligent Voice Assistants (e.g., Siri, S-Voice)
• LEXIN Bluetooth Intercom: Up to 10 people / 2km range
• Integrated CVC & DSP Noise Reduction
• Voice Messages & Boot-up Voice Prompts
• Bluetooth Compatibility with most intercoms
• Cover Replacement Support

Bluetooth V5.0 Profiles Supported:

• Headset Profile (HSP)
• Hands-Free Profile (HFP)
• Advanced Audio Distribution Profile (A2DP)

Audio Quality:

Equipped with HD stereo speakers suitable for various helmet types (modular, jet, off-road, full-face). High-quality, portable, and ultra-thin speakers provide superior audio fidelity. The integrated microphone uses intelligent CVC and DSP noise reduction technology for unmatched wind and ambient noise reduction.

Battery:

With an 800mAh battery, the GTX offers up to 18 hours of music playback or 13 hours of intercom communication, and over a week of standby time.

Function Priority:

(LX-GTX operates in the following priority order)

1. Mobile Phone;
2. Intercom;
3. Music/Radio/GPS.

Note: Lower priority functions are always interrupted by higher priority functions. For example, music is interrupted by intercom, and intercom is interrupted by a phone call. This may vary based on phone settings.

Safety Information:

Notes: During actual use, please ensure compliance with all local laws and regulations regarding the use of helmet speakers.

Product Contents

The package includes:

• LEXIN GTX Main Unit
• Speaker Pads
• Clamp Mount
• Decorative Piece
• Packaging Box
• USB-C Data Cable
• Boom / Button Microphone
• Slim HD Headset
• Microphone Clamp Mount
• 3M Adhesive Mount
• User Manual

Diagram Description: An illustration shows all the included components laid out, including the main GTX unit, two speakers with pads, a boom microphone and a button microphone, a clamp mount, an adhesive mount, a USB-C cable, and the user manual.

Installation Instructions

Mounting the Bracket

1. Clamp Mount: Open the clamp and insert it into the helmet shell, then tighten to secure. (Refer to the illustration showing the clamp mechanism on a helmet).

2. 3M Adhesive Mount: In addition to the clamp mount, you can use the 3M adhesive mount. First, peel off the protective paper from the back of the 3M adhesive. Then, attach the adhesive side to the base of the mount, and then attach the mount to the left side of the helmet in the desired location. Press firmly for 15 seconds and allow the adhesive to cure for 24 hours. (Refer to the illustration showing the adhesive mount being applied to a helmet).

Notes: Although the 3M adhesive method is provided, LEXIN recommends installation using the clamp mount. The 3M adhesive mount is for optional use and is at your own risk. LEXIN accepts no responsibility for its use.

Mounting the Main Unit

Mount the LEXIN GTX main unit onto the bracket. The rear of the GTX unit has two raised square posts that align with corresponding square holes in the bracket.

Step 1: Align the square posts on the rear of the main unit with the square holes in the bracket.

Step 2: Push down until the tabs on the rear of the main unit engage with the bracket's square holes to complete the installation. (Diagram shows the main unit being attached to the bracket, with arrows indicating alignment and downward pressure).

Removing the Main Unit

To remove the main unit:

Step 1: Firmly press down on the tabs located above the bracket.

Step 2: Then, push the main unit upwards from the base to detach it. (Diagram shows pressing the tabs and then lifting the unit off the bracket).

Mounting the Headset Speakers

Note: The headset with the shorter cable is for the left ear, and the one with the longer cable is for the right ear. The speakers are attached inside the helmet liner. If the helmet has a deeper speaker position, you can use the included pads to bring the speaker closer to your ear.

Step 1: Place one half of the speaker's velcro onto the inner lining of the helmet.

Step 2: Firmly press the speaker onto the velcro strip. If the helmet's speaker position is too deep, you can use a pad to raise the speaker.

Step 3: Tuck the excess speaker cable between the helmet liner and the shell. (Diagram shows placing the speaker with velcro inside the helmet liner and tucking the cable).

Mounting the Microphone

Note: The button microphone and boom microphone can be interchanged between full-face and modular helmets. The choice depends on your preference and helmet type.

Full-Face Helmet / Button Microphone:

Step 1: Find a suitable spot on the chin bar of the helmet and attach the velcro side of the microphone to this area.

Step 2: Attach the button microphone to the secured velcro.

Step 3: Connect this microphone to the earphone connector. (Diagram shows the button microphone attached to the chin bar and connected to the headset).

Modular Helmet / Boom Microphone:

Step 1: Attach the velcro side to a suitable spot on the left interior of the helmet, then attach the boom microphone.

Step 2: Adjust the microphone's direction so that the triangular mark on the microphone points towards your mouth.

Step 3: If necessary, use the microphone support for additional positioning. (Diagram shows the boom microphone attached to the helmet interior, with an arrow indicating adjustment towards the mouth, and an optional support bracket).

Basic Operation

Diagram Description: An illustration of the LEXIN GTX unit shows the location of the following buttons and indicators:

• Intercom Button
• Volume + / Next Song Button
• Volume - / Previous Song Button
• Power Button
• Indicator LED
• USB-C Port (Charge / Headset Port)

Power On / Off & Battery

Power On / Off:

Power On: When the device is off, press and hold the power button for approximately 1 second to turn it on. The current battery level will be indicated.

Power Off: When the device is on, press and hold the power button for approximately 1 second to turn it off.

Battery:

Charging: Connect the USB-C cable to a USB port from any DC 5V power source (e.g., mobile charger, computer, power bank). The indicator light will blink red while charging and blink blue when fully charged. Full charging takes approximately 2.5 hours.

Checking Battery Level: In standby mode, double-press the Volume + button to hear the current battery level. There are 5 battery levels: 100%/80%/50%/30%/low.

Note: When the battery is low, the device will automatically shut down after approximately 1 to 1.5 hours of operation, with a "low battery" voice prompt every 20 minutes.

Bluetooth Pairing

Pairing GTX with a Bluetooth Device:

Note: A single GTX unit can connect to up to two mobile phones and one other Bluetooth device simultaneously. On subsequent connections, the GTX Bluetooth will automatically connect to the last connected device, provided Bluetooth is enabled on that device. To reconnect to a mobile device, press the power button. To initiate a Bluetooth intercom conversation, press the intercom button.

Pairing with a Mobile Phone:

Step 1: With the device off, press and hold the power button for approximately 5 seconds. The indicator will blink red and blue, and a voice prompt will say "Pairing in progress" to enter pairing mode.

Step 2: Open the Bluetooth settings on your mobile phone and select "GTX".

Step 3: Follow the on-screen prompts to connect. Some mobiles may ask for a PIN; enter "0000".

Step 4: Confirm on your mobile phone that the pairing is complete.

Note: The GTX indicator LED blinking blue signifies a successful connection, accompanied by the voice prompt "Connection complete".

Pairing with GPS Navigation:

With the device off, press and hold the power button for approximately 5 seconds. The indicator will blink red and blue, and a voice prompt will say "Pairing in progress". When pairing is complete, the indicator will blink blue, and a voice prompt will say "Connection complete".

Note: After pairing, you can connect the GTX with your GPS navigation device.

Call Handling

Answering a Call:

During an incoming call, press the power button to answer.

Auto-Answer:

The device will automatically answer an incoming phone call after 12 seconds.

Note: Auto-answer is disabled by default. Once set, the preference is saved for future use.

Setting Auto-Answer:

In standby mode, press and hold the Volume + button for approximately 6 seconds. The indicator will blink blue 3 times to enable auto-answer. Repeat this operation (press and hold Volume + for ~6 seconds) to disable auto-answer (indicator blinks red 3 times).

Ending a Call:

During an active call, press the power button.

Rejecting a Call:

For an incoming call, double-press the power button.

Three-Way Call Handling:

Answer/Reject Three-Way Call: In a three-way call scenario, press the intercom button once to answer or twice to reject.

Voice Assistant

In standby mode, double-press the power button to activate a voice assistant such as Siri or S-Voice.

Note: The auto-answer setting is saved for the next startup.

Volume & Music Control

Volume Adjustment:

Press the Volume + button to increase the volume. A voice prompt will indicate when the volume is at maximum.

Press the Volume - button to decrease the volume. A voice prompt will indicate when the volume is at minimum.

Note: When multiple audio signals (music, intercom, phone call) are active simultaneously, volume adjustments affect all active signals. To adjust the volume of only one signal, you may need to pause the other(s). For example, if listening to music and using intercom, adjusting volume affects both. To adjust only intercom volume, pause music. To adjust only music volume, exit intercom mode.

Note: All functions can operate simultaneously, except for phone calls and intercom, which cannot function at the same time.

Pause/Play:

In standby mode, single-press the power button.

In music playback mode, single-press the power button.

Note: In audio multitasking mode (Intercom and music simultaneously), double-press the power button to pause the music.

Audio Multitasking

Music Switching:

In music playback mode, double-press the Volume + button for the next song, and double-press the Volume - button for the previous song.

Note: While listening to music, adjust the volume on your mobile phone for a more powerful sound.

Audio Multitasking Function:

Activation: In standby mode, press and hold the Volume - button for approximately 6 seconds to activate audio multitasking. This allows you to have an intercom conversation and listen to music simultaneously.

Deactivation: In standby mode, press and hold the Volume - button for approximately 6 seconds to deactivate audio multitasking. This function is off by default and must be manually activated each time the device is powered on.

Notes:

1. The audio multitasking function is disabled by default and must be reactivated after each startup.
2. Audio multitasking is only available between 2 intercoms; it is not available for more than 2 riders.

Intercom Pairing and Connection

The LEXIN GTX Bluetooth intercoms support full-duplex Bluetooth intercom conversations. Group intercom modes include 4-way and multi-way, with the multi-way mode supporting up to 10 riders.

Notes: Before pairing for group intercom, the main units must be in a unified mode (quad intercom or group intercom mode). If paired units are not in unified mode, they cannot be paired correctly.

Clear Bluetooth Pairing Records:

Simultaneously press and hold the Volume + and Volume - buttons for 2 seconds until the indicator light blinks red. All previous connections will be cleared from the device.

Pairing and Connecting 2-4 Units:

The following pairing process is suitable for groups of 2-4 Bluetooth users.

Establish Pairing: In standby mode, press the intercom button on the first GTX unit and all other GTX units for 1 second. The indicator will blink red and blue, and a voice prompt will announce "Pairing in progress".

Diagram Description: Shows pressing the intercom button for 1 second on Unit 1 (indicator blinks red/blue), and similarly on Unit 2/3/4.

Press the intercom button on the first unit to search for other units. A "searching" voice prompt will be heard, and the LED will blink blue rapidly. The first unit will announce "Pairing successful", and then the other units will prompt "searching", followed by "Pairing successful" after approximately 6 seconds.

Diagram Description: Shows Unit 1's LED blinking rapidly blue, and Units 2/3/4 waiting with LED blinking rapidly blue. After pairing, all units' LEDs blink slow blue.

Activating Intercom (2-4 Units):

Once four GTX devices are paired, press the intercom button on any one of them. The indicator will blink violet to activate the intercom function.

Diagram Description: Shows pressing the intercom button, indicator blinks violet on Unit 1, and waiting indicator turns violet blinking on Unit 2/3/4. In Bluetooth intercom mode, all main unit indicators blink violet.

Ending Intercom:

In intercom mode, press the power button on any device to end the intercom. The indicator will blink blue. The device will disconnect the intercom and any bridged devices.

Diagram Description: Shows pressing the power button until the indicator blinks blue (on any device).

Pairing and Connecting 5-10 Units:

Important: The default conversation mode is for four people. For more than five people (including five people), press and hold the Volume - button for 6 seconds in standby mode. A voice prompt will be heard, and the indicator will blink red rapidly, indicating "multi-person conversation" mode. This operation is not memorized; the four-person conversation mode is the default upon startup. For group conversations of more than five people, press and hold the Volume - button for 6 seconds.

Diagram Description: Shows pressing the Volume - button for 6 seconds until the indicator blinks red (on any device).

Note: Before pairing for group intercom, the main units must be in a unified mode (quad intercom or group intercom mode). If paired units are not in unified mode, they cannot be paired correctly.

The pairing method for 5 to 10 people is the same as described above: all devices press the intercom button for 1 second until the indicators blink red and blue, entering Bluetooth pairing mode simultaneously. Press one of the intercom buttons to initiate pairing. Once pairing is successful, press the intercom button on any device to launch the 5-10 party intercom. Press the power button to exit Bluetooth intercom.

Establish Pairing: In standby mode, press the intercom button on the first GTX unit and all other GTX units for 1 second. The indicator will blink red and blue, and a voice prompt will announce "Pairing in progress".

Diagram Description: Shows pressing the intercom button for 1 second on Unit 1 (indicator blinks red/blue), and similarly on another unit.

Press the intercom button on the first unit to search for other units. A "searching" voice prompt will be heard, and the LED will blink blue rapidly. The first unit will announce "Pairing successful", and then the other units will prompt "searching", followed by "Pairing successful" after approximately 6 seconds.

Diagram Description: Shows Unit 1's LED blinking rapidly blue, and another unit waiting with LED blinking rapidly blue. After pairing, all units' LEDs blink slow blue.

Activating Intercom (5-10 Units):

Once the pairing of 5-10 GTX devices is complete, press the intercom button on any one of them. The indicator will blink violet to activate the intercom function.

Diagram Description: Shows pressing the intercom button, indicator blinks violet on the first unit, and the waiting indicator turns violet blinking on the other unit. In Bluetooth intercom mode, all main unit indicators blink violet.

Attention:

If units become disconnected, they are regrouped. Group intercom conversations will be split across 2 distinct intercoms.

Ending Intercom:

In intercom mode, press the power button on any device to end the intercom. The indicator will blink blue. The device will disconnect the intercom and any bridged devices.

Diagram Description: Shows pressing the power button until the indicator blinks blue (on any device).

Generic Function

Pair with Other Bluetooth Intercoms:

Step 1: In standby mode, press the power button for 1 second. The indicator will blink red and blue, and a voice prompt will announce "Pairing in progress".

Step 2: Activate the other Bluetooth intercoms and put them into pairing mode.

Step 3: Press the intercom button to search for a pairing. The indicator will blink rapidly blue. Once pairing is complete, the indicator will blink blue, and a voice prompt will announce that pairing is successful.

Step 4: Once pairing is established, double-press the intercom button, and the indicator will blink violet to activate the intercom.

Step 5: In intercom mode, press the power button, and the indicator will blink blue, ending the intercom.

Note: When pairing with intercoms from other brands, do not use the audio multitasking function.