Bluetooth technology 3.0 version, 8 hours of talk time and 110 hours of standby. Fully washable microfiber lining and 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.
One Touch Control for Calling, Answering, Rejecting Incoming Calls and Redialing. Incoming Phone Call Overrides Intercom, Music, FM Radio and GPS Navigation Audio.
Supports a Maximum distance of 1680 Feet Between Two Riders While Using the Intercom Function. Two High Quality Built-in Speakers with Full Stereo Sound to Enjoy Communication or Music.
Meets or Exceeds DOT Safety Standards. DSP Echo Cancellation and Noise Suppression Technology Delivers High-quality Voice at High Speeds.
Note: When the Bluetooth System has not been used for a long time, the battery will enter into deep sleep mode and Bluetooth device may not available. Charge the battery for about half an hour to wake it up. The Bluetooth function will be restored after charging. If there is any missing small parts of the item received, welcome to contact ILM customer service for help.