LEXIN B4FM Motorcycle Bluetooth Headset — 10-Rider Intercom, IP67 Waterproof, 15h Battery

LEXIN B4FM is a motorcycle Bluetooth headset and intercom that connects up to 10 riders, shares music between two users, offers noise-reduced calls, and is built to IP67 waterproof standards for all-weather riding.

The LEXIN B4FM combines long battery life, dependable Bluetooth communication, and flexible microphone options into a single helmet communication system. Designed for motorcyclists, snowmobilers and other outdoor users, it supports group intercom, FM radio, hands-free calling with voice assistants, and stereo audio. Lightweight speakers and wind-resistant microphones work together with Qualcomm and DSP/CVC processing to keep voices and music intelligible at speed.

How many riders can talk together and how far will the intercom reach?

The B4FM supports group intercom for up to 10 riders using advanced Bluetooth networking, with the most stable performance in smaller groups. Range is rated to about 2000 meters (1.2 miles) in open terrain, though real-world conditions like terrain and helmet position will influence reach.

• 10-way group intercom capability; optimum clarity with 3–4 riders
• Line-of-sight range up to 2000 meters (1.2 miles)
• Qualcomm chipset to improve connection and reduce dropouts
• Automatic reconnection and secure data transmission

Can riders share music and how good does audio sound at speed?

Two riders can share the same track instantly by double-clicking the power button, and Mylar coaxial speakers deliver clear stereo sound. DSP and CVC processing reduce wind and road noise, making music and navigation prompts intelligible even at higher speeds.

• Music sharing between two headsets with a simple double-click
• Hi‑Fi stereo playback through Mylar coaxial speakers
• DSP/CVC noise processing for clearer audio at highway speeds
• Wind-resistant microphones to preserve vocal clarity

What battery life and weather protection does the LEXIN B4FM offer?

The device houses an 800mAh battery that supports extended use: roughly 15 hours of music or talk time and over a week of standby. IP67-rated sealing and waterproof plugs allow operation in rain, snow and cold conditions down to specified low temperatures.

• 800mAh battery: about 15 hours active use and 168+ hours standby
• IP67 water and dust protection for reliable outdoor performance
• Works in cold-weather environments; sealed ports prevent moisture ingress
• Fast, energy-efficient Bluetooth chipset for longer runtimes

Which helmets and accessories are compatible with this headset?

LEXIN designed the B4FM for broad compatibility: it pairs with most Bluetooth helmet systems, LEXIN models, and third-party units. Two different microphone types—boom and button—are included to suit open, modular, or full-face helmets and various outdoor activities.

• Universal Bluetooth pairing with LEXIN and many other brands
• Includes boom mic for open/flip helmets, button mic for full-face helmets
• Hands-free calling and voice assistant support (Siri, etc.)
• Also suitable for snowmobiling and other outdoor sports

Who is this for? The LEXIN B4FM is aimed at group riders and outdoor enthusiasts who want a rugged, multi‑feature helmet communication system. It fits motorcyclists needing reliable intercom and music sharing on long rides, commuters who want hands-free calls and navigation prompts, and anyone who rides in mixed weather and needs a waterproof, long‑running headset with flexible mic options.