1. Producte acabatview
The LEXIN LX-B4FM is a Bluetooth v5.0 HiFi Stereo Headset designed for motorcycle use. It enables hands-free mobile phone calls, high-fidelity stereo music playback, FM radio reception, and wireless voice instructions from Bluetooth-enabled GPS navigation units. The system supports conference intercom conversations for up to 10 riders, with an intercom range of 2000 meters (1.2 miles) for a group, and 500 meters for two riders.
Key features include a Qualcomm chip for reliable connectivity, extended battery life, clear sound, and secure data transmission. It also offers music sharing capabilities and advanced noise cancellation technology.
2. Configuració i instal·lació
2.1 Contingut del paquet
Abans de la instal·lació, assegureu-vos que hi hagi tots els components:
- LEXIN LX-B4FM Main Unit
- Micròfon de braç (per a cascs oberts o abatibles)
- Micròfon de botó (per a cascs integrals)
- Altaveus
- Mounting Brackets and Adhesives
- Cable de càrrega USB
2.2 Installation in Helmet
The LX-B4FM is compatible with various helmet types. Choose the appropriate microphone for your helmet style:
- Micròfon de braç: Recommended for open-face or flip-face helmets. Position the microphone close to your mouth for optimal voice pickup.
- Micròfon de botó: Suitable for full-face helmets. Mount it inside the helmet near the mouth area.
Secure the main unit to the side of your helmet using the provided clamp or adhesive mount. Route the speaker and microphone cables neatly within the helmet padding to avoid discomfort or interference.

Image: The LEXIN B4FM unit and its various components, including the main module, speakers, and two types of microphones, ready for helmet installation.
2.3 Càrrega del dispositiu
Before first use, fully charge the LX-B4FM unit. Connect the provided USB charging cable to the unit and a power source. A full charge typically takes approximately 3 hours. The 800mAh battery provides up to 15 hours of talk or music playback time and over 168 hours of standby time.

Image: A LEXIN B4FM unit mounted on a helmet, with icons indicating 15 hours talk time, 15 hours music time, and 3 hours for a full charge.
2.4 Emparellament inicial
To pair the LX-B4FM with your mobile phone or another intercom unit:
- Ensure the LX-B4FM is powered off.
- Premeu i manteniu premut el botó d'engegada fins que l'indicador LED parpellegi en vermell i blau, cosa que indica el mode d'emparellament.
- On your mobile phone, enable Bluetooth and search for available devices. Select 'LEXIN B4FM' from the list.
- Un cop connectat, l'indicador LED parpellejarà blau lentament.
The LX-B4FM supports universal pairing with most motorcycle headsets, including other LEXIN models (G2P, GTX, G16, MeshCom, Novus) and various other brands.

Image: A LEXIN B4FM unit mounted on a helmet, illustrating its capability for universal pairing with other brands of intercom systems.
3. Instruccions de funcionament
3.1 Encès/Apagat
- Encès: Press and hold the Power button for approximately 3 seconds until the LED flashes blue.
- Apagar: Press and hold the Power button for approximately 5 seconds until the LED flashes red and then turns off.
3.2 Comunicació per intercomunicador
The LX-B4FM supports group intercom for up to 10 riders, with optimal performance for groups of 4. The maximum range is 2000 meters (1.2 miles) for a group, and 500 meters for two riders.
- Inicia l'intercomunicació: After pairing with other LX-B4FM units, a short press of the Intercom button will initiate a conversation.
- Finalitzar l'intercomunicador: Premeu de nou el botó d'intercomunicador per finalitzar la conversa.

Image: An illustration showing multiple motorcycles on a winding road, demonstrating the LEXIN B4FM's intercom range for up to 10 riders (best for 4) over 1.2 miles, with a specific range of 500m for two riders.
3.3 Music Playback and Sharing
Enjoy HiFi stereo music through the Mylar coaxial speakers. The LX-B4FM features DSP/CVC technology for clear audio quality even at speeds up to 120 km/h.
- Reproduir/pausar música: Premeu breument el botó multifunció.
- Pista següent: Premeu breument el botó de pujar el volum.
- Pista anterior: Premeu breument el botó per baixar el volum.
- Compartir música: Two riders can enjoy the same song by double-clicking the Power button on one of the paired units.

Image: Two riders on motorcycles, illustrating the music sharing feature of the LEXIN B4FM, allowing them to enjoy the same song simultaneously.
3.4 Phone Calls and Voice Assistant
When paired with your mobile phone, the LX-B4FM allows for hands-free communication.
- Respon a la trucada: Premeu breument el botó multifunció.
- Finalitzar la trucada: Premeu breument el botó multifunció.
- Rebutja la trucada: Manteniu premut el botó multifunció durant 2 segons.
- Torna a marcar l'últim número: Double-click the Multi-function button.
- Activa l'assistent de veu (Siri/Assistent de Google): Premeu i manteniu premut el botó multifunció durant 2 segons (quan no esteu en una trucada).
3.5 Ràdio FM
The LX-B4FM includes an integrated FM radio.
- Turn FM Radio On/Off: Premeu i manteniu premut el botó FM durant 2 segons.
- Estacions d'escaneig: Short press the Volume Up or Volume Down button to tune to the next/previous station.
4. Manteniment
4.1 Impermeabilització
The LX-B4FM helmet communication system is designed with IP67 waterproof ports and plugs, ensuring reliable performance in various weather conditions, including temperatures as low as -22°F (-30°C). While it is waterproof, avoid submerging the unit in water for extended periods.

Image: A LEXIN B4FM unit mounted on a helmet, with water droplets on the helmet and windshield, emphasizing its waterproof capabilities and ability to function in rain.
4.2 Cura de la bateria
- Per allargar la durada de la bateria, eviteu descarregar completament la unitat amb freqüència.
- Charge the unit regularly, even if not in use for extended periods (e.g., once every 3 months).
- Guardeu la unitat en un lloc fresc i sec quan no s'utilitzi.
4.3 Neteja
Netegeu la unitat amb un suau, damp tela. No utilitzeu productes químics aggressivs ni netejadors abrasius.
5. Solució De Problemes
If you encounter issues with your LX-B4FM, refer to the following common problems and solutions:
- Sense energia: Ensure the unit is fully charged. Connect it to a charger and check if the charging indicator lights up.
- No hi ha so dels altaveus: Check that the speaker cables are securely connected to the main unit. Verify volume levels on both the LX-B4FM and your connected device.
- Cannot Pair with Phone/Intercom: Ensure both devices are in pairing mode. Turn off and restart both devices, then attempt pairing again. Clear previous pairings on your phone if necessary.
- L'intercomunicador es desconnecta amb freqüència: Ensure units are within the specified intercom range. Obstacles and terrain can affect range. Check for low battery on either unit.
- Mala qualitat d'àudio/soroll: Ensure the microphone is positioned correctly and not obstructed. Check for strong electromagnetic interference.
- Botons que no responen: Try resetting the device by pressing and holding the Power button for an extended period (e.g., 10-15 seconds) or by charging it.
6. Especificacions tècniques
| Número de model | LX-B4FM |
| Versió Bluetooth | v5.0 |
| Intercom Range (Group) | Up to 2000 meters (1.2 miles) for 10 riders (best for 4) |
| Abast d'intercomunicador (2 passatgers) | Fins a 500 metres |
| Capacitat de la bateria | 800mAh Lithium Metal |
| Temps de conversa | Fins a 15 hores |
| Temps de reproducció de música | Fins a 15 hores |
| Temps d'espera | Més de 168 hores |
| Temps de càrrega | Aproximadament 3 hores |
| Classificació impermeable | IP67 |
| Temperatura de funcionament | -22 °F a 122 °F (-30 °C a 50 °C) |
| Mètode de control | Toc, veu |
| Material | Plàstic |
| Pes de l'article | 0.59 quilograms (1.3 lliures) |
7. Garantia i Suport
7.1 Informació de la garantia
LEXIN products are manufactured to high-quality standards. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official LEXIN weblloc web. Conserveu el comprovant de compra per a reclamacions de garantia.
7.2 Atenció al client
If you require further assistance, have questions, or encounter issues not covered in this manual, please contact LEXIN customer support. You can typically find contact information, FAQs, and additional resources on the official LEXIN weblloc:





