LEXIN LX-B4FM Motorcycle 4-Way Conference Intercom

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1. Introduction

Thank you for choosing the LX-B4FM Motorcycle 4-Way Bluetooth Conference Intercom. This product offers a 1,600 meter (1 mile) bike-to-bike full-duplex intercom range, includes Bluetooth stereo wireless helmet headset(s), and is designed for installation into most open face, modular, and full-face style helmets.

With the LX-B4FM, you can:

• Call hands-free on your Bluetooth mobile phone.
• Listen to stereo music or voice instructions from GPS navigation.
• Activate wireless Intercom for rider-to-rider or rider-to-passenger conversation within a range of 1600 meters when four units are connected.

The LX-B4FM is compliant with Bluetooth Specification V3.0, supporting the following profiles: Headset Profile (HSP), Hands-Free Profile (HFP), and Advanced Audio Distribution Profile (A2DP). It supports universal pairing with most Bluetooth headsets. The unit allows activation of Siri or S-Voice for voice dialing and commands. An integrated FM radio tuner supports station scanning.

Superior audio fidelity is provided by high fidelity, non-ported, ultra-slim helmet speakers. The headset also offers excellent wind and ambient noise reduction with its miniature boom microphone.

The main unit is powered by a rechargeable lithium ion/polymer battery, providing 10-15 hours of active use from a full charge. Standby time exceeds one week. Please read this User Manual carefully before using the product.

2. Package Contents

The package includes:

• LX-B4FM Main Unit
• Stereo HD Speaker with Interchangeable Microphone (for Open Face Helmet or Full Face Helmet)
• USB Cable
• Clip Mounting Bracket
• 3M Tape Bracket
• User Manual

How it Works

The LX-B4FM facilitates various communication modes:

• Rider-to-rider intercom: Full duplex communication between multiple riders. (Depicted with 4 motorcycles).
• Rider-to-passenger intercom: Full duplex communication between rider and passenger. (Depicted with 1 motorcycle).
• GPS Navigation: Listen to voice instructions from a GPS device. (Depicted with GPS icon).
• Mobile Phone Connectivity: Make calls and listen to music via a Bluetooth-enabled cell phone with A2DP profile. (Depicted with phone and music icons).

3. Installation Instructions

3.1 Mounting Bracket

Clip Mounting Bracket: Insert the bracket between the internal padding and external shell of the helmet. (Visuals show steps 1-4 of clipping the bracket onto a helmet).

3M Tape Bracket: If you encounter issues with the clip mounting, use the 3M tape bracket. Peel off the protective backing, adhere the bracket to the helmet, press for 15 seconds, and allow 24 hours for the glue to dry. (Visuals show steps of applying the 3M tape bracket). LEXIN recommends bracket mounting; 3M tape mounting is an option offered at the user's own risk.

3.2 Microphone Placement

For Full Helmets: Locate an area in the nose section, just left of center. Mount the button microphone to the velcro pad and connect it to the headset connector. (Visuals show placement on a helmet).

For Open Face Helmets: Adjust the microphone direction so the triangular mark points towards your mouth. (Visuals show microphone adjustment).

3.3 Speaker Placement

Place the speakers into the cheek pads. Push the speakers and microphone firmly against the Velcro pads.

3.4 Wire Routing

Press the wires into the gap between the helmet liner and shell.

Note: The speaker with the shorter wire is for the left ear, and the longer wire is for the right ear, which also helps enhance FM radio reception.

3.5 Mounting the Main Unit

Slide the LX-B4FM main unit down onto the bracket until it clicks firmly into the bottom portion of the bracket. (Visuals show steps 1-2 of sliding the unit onto the bracket).

3.6 Removing the Main Unit

To remove the main unit from the bracket, push it upwards. (Visuals show steps 1-2 of removing the unit).

4. General Operation Instructions

4A. Powering On/Off and Charging

• Power On: Press and hold the [Power Button] for approximately three seconds. The LED will blink blue. A voice announcement will indicate the expected battery life.
• Power Off: Press and hold the [Power Button] for approximately three seconds. The blue LED will turn red, then off.
• Charging: Plug the micro USB cable into the USB port of a DC 5V power supply (e.g., mobile phone charger, computer, laptop, power bank). The LED turns red while charging and blue when fully charged. Charging takes about 2.5 hours.
• Low Battery Alert: When the battery falls below 20%, the LED flashes red, and a tone alert sounds every five minutes until the battery is recharged.

4B. Pairing the LX-B4FM with a Bluetooth Device

Pairing is required for the first use with any Bluetooth device (mobile phones, audio devices like MP3 or GPS, other LEXIN Bluetooth headsets). This operation is only needed once per device; the headset will remain paired and reconnect automatically when in range.

• Pairing a Mobile Phone:
  1. With the unit powered off, press and hold the [Power Button] for about 6 seconds until the LED alternates between red and blue.
  2. On your mobile phone, search for Bluetooth devices. The headset will appear as "LX-B4FM".
  3. Enter "0000" for the PIN if prompted.
  4. Your mobile phone will confirm successful pairing. The blue LED blinks upon connection.
• Pairing a Stereo Bluetooth Adaptor:
  1. Turn on the audio source and prepare the Stereo Bluetooth Adaptor for pairing.
  2. Put the LX-B4FM main unit into Bluetooth pairing mode (as described above).
  3. Turn on or plug in the Stereo Bluetooth Adaptor.
  4. The audio source will automatically play through the LX-B4FM upon successful pairing.
• Pairing Bluetooth GPS Navigation:
  1. Follow the same procedure as "Pairing a Mobile Phone".
  2. Refer to the Bluetooth GPS navigation manual for specific details.
  3. You can then listen to Bluetooth voice instructions from the GPS navigation.

5. Controls and Functions

5.1 Volume and Music Control

• Adjust volume by pressing the [Volume +] or [Volume -] buttons. A beep indicates maximum or minimum volume.
• Press the [Power Button] to play or pause music.
• While music is playing, press and hold the [Volume -] button to go to the next track, and press and hold the [Volume +] button to go to the previous track.

Note: When streaming music from a smartphone, you may need to adjust the volume on the smartphone as well for louder output.

5.2 Safe Mobile Phone Calls - Incoming and Outgoing

• Answer Incoming Call: The unit will automatically answer after 12 seconds, or you can press the [Power Button] to answer immediately.
• Disable/Enable Auto-Answer: Press and hold both the [Power Button] and [Intercom Button] for 3 seconds. A red light flash (3 times) indicates disabled; a blue light flash (3 times) indicates enabled.
• Reject Incoming Call: Press and hold the [Power Button] for two seconds.
• End Active Phone Call: Press the [Power Button].
• Voice Dial: In standby mode, double-click the [Power Button] to activate Siri or S-Voice. A beep will sound, followed by a voice prompt. Speak the name from your phone list to dial.
• Last Phone Call Number Redial: In standby mode, double-click the [Volume + Button] to redial the last number.

Note: In some cases (e.g., high-power RF radio influence or metal blocking), the headset may disconnect from the mobile phone. A short press of the [Power Button] will reconnect it.

5.3 Bluetooth Intercom Talk

The LX-B4FM can be paired with other LX-B4FM units for full duplex Bluetooth intercom talk, supporting up to four units. Different pairing processes exist for two, three, and four units. When more than two units are connected, there are 'End units' and 'Bridge units'. To maximize range, riders should maintain the connection order.

Note: It is strongly recommended to clear existing connections before pairing for communication, especially before riding. To clear connections, press and hold the [Volume +] and [Volume -] buttons simultaneously until the red LED flashes.

1) Pairing Two LX-B4FM Headsets to Talk

• Tips: You must pair the two units first to start an intercom talk.
• Step 1: Pairing two LX-B4FM units: Power on both units. Press and hold the [Intercom Button] for two seconds until the red and blue LEDs flash quickly on each unit. Then, click the [Intercom Button] on either unit until the blue LED flashes quickly on that unit. Once pairing is complete, the blue LED will flash on both units (no red). (Visuals show button presses and LED indicators for pairing).
• Step 2: Start an intercom talk: Click the [Intercom Button] on one unit. Wait three to five seconds for the units to connect. In Intercom mode, both blue and red LEDs blink simultaneously. (Visuals show button presses and LED indicators for starting intercom).
• Step 3: Disconnect an intercom talk: Click the [Intercom Button] on one unit again to quit the intercom. After disconnection, the blue LED will flash on both units. (Visuals show button presses and LED indicators for disconnecting intercom).

2) Pairing Three LX-B4FM Headsets to Talk

• Tips: Before pairing, mark each LX-B4FM unit with a different number and color (red or blue) for clarity.
• Step 1: Pairing unit one with unit two: Power on unit one (e.g., blue mark) and unit two (e.g., red mark). Simultaneously hold the [Intercom] and [V+] buttons on both units for two seconds to enter pairing mode for channel 1, until the red and blue LEDs flash on both units. Then, click the [Intercom Button] on either unit; the blue LED will flash quickly. Pairing is complete when the blue LED blinks on both units. (Visuals show button presses and LED indicators).
• Step 2: Pairing unit two with unit three: Power on unit three (e.g., blue mark). Simultaneously hold the [Intercom] and [V-] buttons on both unit two and unit three for two seconds until the red and blue LEDs flash to enter pairing mode for channel 2. Then, press the [Intercom Button] on either unit until the blue LED flashes quickly. Pairing is complete when the blue LED blinks on both units. (Visuals show button presses and LED indicators).
• Step 3: Start 3-way intercom talk: After all three units are paired, unit two (red mark) acts as the bridge unit. Click the [Intercom Button] on unit one or unit two to connect those two units. Double-click the [Intercom Button] on unit three or unit two to connect those two units. All three units will then be connected. (Visuals show button presses and LED indicators for connecting units).
• Note: During conference intercom talk, both blue and red LEDs blink simultaneously on each unit.
• Step 4: Disconnect the intercom talk: Click the [Intercom Button] on unit one or unit two to disconnect them (unit two and unit three remain connected). Double-click the [Intercom Button] on unit three or unit two to disconnect those two units, resulting in all three units being disconnected. (Visuals show button presses and LED indicators).
• Important Note: The Bridge unit cannot be connected with a Bluetooth device (phone or GPS) while it is being used as an Intercom Bridge unit.

3) Pairing Four LX-B4FM Headsets to Talk

• Tips: Before pairing, mark each LX-B4FM unit with a different number and color (red or blue) for clarity.
• Step 1: Pairing the two bridge units: Power on unit two (e.g., red mark) and unit three (e.g., red mark); they will be set as bridge units. Simultaneously hold the [Intercom] and [V-] buttons on both units for two seconds until the red and blue LEDs flash to enter pairing mode for Channel 2. Then, press the [Intercom Button] on either unit; the blue LED will flash quickly. Pairing is complete when the blue LED blinks on both units. (Visuals show button presses and LED indicators).
• Step 2: Pairing the bridge units with end units:
  
  • Power on unit one (e.g., blue mark). Simultaneously hold the [Intercom] and [V+] buttons on both unit one and unit two for two seconds until the red and blue LEDs flash on both units to enter pairing mode for Channel 1. Then, click the [Intercom Button] on either unit; the blue LED will flash quickly. Pairing is complete when the blue LED blinks on both units. (Visuals show button presses and LED indicators).
  • Power on unit four (e.g., blue mark). Simultaneously hold the [Intercom] and [V+] buttons on both unit three and unit four for two seconds until the red and blue LEDs flash on both units to enter pairing mode for Channel 1. Then, click the [Intercom Button] on either unit; the blue LED will flash quickly. Pairing is complete when the blue LED blinks on both units. (Visuals show button presses and LED indicators).
• Step 3: Start 4-way intercom talk: After all four units are paired, unit two (red mark) and unit three (red mark) serve as bridge units. Double-click the [Intercom Button] on unit two or unit three to connect the two bridge units. Click the [Intercom Button] on unit one or unit two to connect those two units. Click the [Intercom Button] on unit four or unit three to connect those two units. All four units will then be connected. (Visuals show button presses and LED indicators).
• Note: During conference intercom talk, both blue and red LEDs blink simultaneously on each unit.
• Step 4: Disconnect the intercom talk: Double-click the [Intercom Button] on unit two or unit three to disconnect the two bridge units. Unit two will remain connected with unit one, and unit three with unit four. Click the [Intercom Button] on unit one or unit two to disconnect those two units. Click the [Intercom Button] on unit four or unit three to disconnect those two units. (Visuals show button presses and LED indicators).
• Tips: To connect bridge units, double-click the [Intercom Button]. To connect a bridge unit with an end unit, press the [Intercom Button] once on the end units.
• Notes: A beep sound indicates the start of an intercom talk; connection may take a few seconds. If bridge units disconnect, the group disconnects. If an end unit disconnects, the other three remain connected. If a unit loses connection, the two units on the same channel remain connected; follow connecting instructions to reconnect. If a rider goes out of range, the intercom may disconnect; the LX-B4FM attempts reconnection every eight seconds (high tone double beeps). Press the [Intercom Button] to stop reconnection attempts. For successful four-rider communication, connect the two bridge units (red) first using [Intercom] + [Volume -], then connect them to the end units (blue) using [Intercom] + [Volume +]. Keep bridge units within range for continuous communication.
• Tips: Disconnect intercom units when not in use to save battery power.
• Important: The Bridge unit cannot be connected with a Bluetooth device (phone or GPS) while it is being used as an Intercom Bridge unit.

5.4 Universal Pairing

To pair with other brand intercom headsets, follow the same procedure as two-way intercom pairing. To initiate intercom talk with a different brand headset, press both [Volume +] and [Volume -] buttons simultaneously. To end the intercom, simply press the [Power Button].

5.5 Stereo Music and FM Radio

• Bluetooth Wireless Stereo: Pair your Bluetooth audio device (requiring A2DP profile) with the LX-B4FM. You can remotely control music playback, including volume adjustment and play/pause functions.
  • Adjust volume: Press [Volume +] or [Volume -] buttons.
  • Play/Pause music: Press the [Power Button].
• FM Radio: Press and hold the [Volume -] button for two seconds to enter FM radio mode. Double-click the [Volume +] or [Volume -] button to scan up or down for your desired station.

5.6 Function Priority

The LX-B4FM operates with the following priority order:

1. Mobile phone (highest)
2. Intercom
3. Bluetooth stereo music, FM radio (lowest)

Lower-priority functions are always interrupted by higher-priority functions (e.g., music is interrupted by an intercom call, and intercom conversation by an incoming mobile phone call).

5.7 Reset

To clear previous pairings, press the [Volume +] and [Volume -] buttons simultaneously until the LED flashes red.

5.8 Battery Life Prompt

Check the current battery life by holding the [Volume +] button. A voice will announce the charge level.

6. Maintenance and Care

The LX-B4FM should be treated with care. The following suggestions will help maintain your warranty:

• 6.1: Do not use or store the device in dusty or dirty environments, as moving parts and electronic components can be damaged.
• 6.2: Do not store the device in high heat areas. High temperatures can shorten the life of electronic devices, damage batteries, and warp or melt plastics.
• 6.3: Do not store the device in cold temperature areas. Moisture can form inside the device when it returns to normal temperature, potentially damaging electronic circuit boards.
• 6.4: Do not attempt to open the LX-B4FM case.
• 6.5: Do not drop or knock the device. Rough handling can break internal circuit boards and fine mechanics.
• 6.6: Do not use harsh chemicals, cleaning solvents, or strong detergents to clean the device.
• 6.7: Do not paint the device, as paint can clog moving parts and prevent proper operation.

These suggestions apply equally to the headset main unit, speaker-microphone clamp unit, and power charger.

7. Certification and Safety Approvals

FCC Compliance Statement

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

FCC RF Exposure Statement

The antenna(s) used for this device must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operated in conjunction with any other antenna or transmitter.

FCC Caution

Any changes or modifications to the equipment not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

CE Declaration of Conformity

This product is CE marked according to the provisions of the RandTTE Directive (99/5/EC). LEXIN declares that this product is in compliance with the essential requirements and other relevant provisions of Directive 1999/5/EC.

8. Warranty

LEXIN warrants that this product shall conform to and perform in accordance with published technical specifications and accompanying written materials, and shall be free of defects in materials and workmanship for a period of one (1) year from the date of purchase by the first consumer purchaser. The limited warranty extends only to the original consumer purchaser and is not assignable or transferable. This warranty is limited to the repair and/or replacement, at LEXIN's discretion, of defective or non-conforming Product. LEXIN shall not be responsible for the failure of the Product to perform specified functions, or any other non-conformance caused by or attributable to: (a) misapplication or misuse; (b) failure to adhere to specifications or instructions; (c) neglect, abuse, or accident; or (d) associated or complementary equipment or software not furnished by LEXIN.

Limited warranty service may be obtained by delivering the Product to LEXIN or the distributor it was purchased through, with proof of purchase. Customers agree to insure the Product or assume risk of loss/damage in transit, prepay shipping charges, and use the original shipping container or equivalent.

9. Waiver and General Release

By using the Product, you waive substantial legal rights, including the right to sue. Please read the following carefully. By using the Product, you agree to be bound by this agreement and forfeit the right to sue.

By using the Product, you irrevocably release, indemnify, and hold LEXIN harmless from any liability, loss, claim, and expense (including attorney's fees) for any bodily injuries, harm, or death, as well as losses or damages to goods, vehicles, or property, resulting from the use of the Product under any circumstances, irrespective of jurisdiction.

• 9.1: You, your heirs, legal representatives, successors, or assigns, hereby voluntarily and forever release, discharge, indemnify, and hold harmless LEXIN from any and all litigation, claims, debts, demands, actions, and liability which may arise, directly or indirectly, from using the Product for any distress, pain, suffering, discomfort, loss, injury, death, or damages to any person or property, however caused, WHETHER ARISING FROM THE NEGLIGENCE OR OTHERWISE, and which may hereafter accrue, to the fullest extent permitted by law.
• 9.2: You fully understand and assume the risks in using the Product, including the risk of negligent acts or omissions by others. All risks for operating the Product are assumed solely by the user.
• 9.3: You confirm that you are physically capable to use the Product and have no medical conditions that may infringe upon your abilities. You confirm you are at least eighteen (18) years of age and have been advised of the risks. You further confirm that you will not consume alcohol or mind-altering substances that may affect your alertness before or during use.
• 9.4: You acknowledge our warnings and understand that:
  • (a) Risks and dangers exist in traffic, including injury, illness, fractures, paralysis, or death.
  • (b) These risks may be caused by the negligence of the manufacturer, its agents, or any third party involved in design or manufacturing.
  • (c) These risks may arise from foreseeable or unforeseeable causes.
  You hereby assume all risks and dangers and all responsibility for any losses or damages, whether caused in whole or in part by the negligence or other conduct of others, including LEXIN.
• 9.5: By using the Product, you confirm that you have read this release of liability and fully understand and accept its terms and conditions.

WARNING: PLEASE CHECK ALL LOCAL LAWS AND REGULATIONS REGARDING THE USE OF IN-HELMET SPEAKERS WHILE OPERATING MOTORIZED VEHICLES.

Contact Information

Website: WWW.LEXINMOTO.COM

Email: support@lexinmotorcycle.com

Phone: +1 (800) 380-8248