ILM Bluetooth Integrated Modular Flip up Full Face Motorcycle Helmet Sun Shield

Bluetooth technology 3.0 version 9 hours of talk time and 120 hours standby. Fully washable microfiber lining adjustable vents. This Helmet Runs 1 Size Smaller Due to Built-in Bluetooth Module. The size of this helmet: S:55-56,M:57-58CM,L:59-60CM,XL:61-62CM,XXL:63-64CM.Group intercom between 6-8 riders with a maximum distance of up to 3,280 feet, only compatible with Bluetooth ILM helmets and Bluetooth helmets with 6-8 riders group intercom function. Two high quality built-in speakers with full stereo sound.One-touch control to call, answer, reject incoming calls, and dial again. The incoming call cancels the intercom music FM radio and GPS navigation audio.Meets or exceeds FMVSS-218 and DOT safety standards. DSP echo cancellation noise suppression technology delivers high-quality voice at high.speeds.Known issues with the Bluetooth system: When helmet's Bluetooth system has not been used 4 a long time the battery will enter deep sleep mode. During this time, Bluetooth mode unavailable