ILM Bluetooth Integrated Modular Flip up Full Face Motorcycle Helmet Sun Shield Mp3 Intercom (M, MATTE BLACK) Bluetooth 3.0 Technology. 8 Hours of Talk Time and 110 Hours of Standby. Fully Washable Microfiber Liner and Adjustable Vents. 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 Max distance of up to 1000 Feet Between Two Riders Using the Intercom. 2 High Quality Built-in Speakers with Full Stereo Sound. Meets or Exceeds both ECE and DOT Safety Standards. DSP Echo Cancellation and Noise Suppression Technology Offers High Quality Voice at High Speeds. Known issues with the Bluetooth System -- When the helmet Bluetooth system hasnt been used for a long time, the battery will enter deep sleep mode. During this time, Bluetooth mode may not be available. To wake the battery up, charge the battery for about half an hour. After this charge, Bluetooth functionality will be restored. <span class="a-text-bold">Listen to Music</span> via Your BluetoothCompatible MP3 Player/Phone. <span class="a-text-bold">FM Radio</span>, <span class="a-text-bold">GPS</span> Voice Commands Available. <span class="a-text-bold">One Touch Control</span> for Call Answering, Rejecting, and Redialing. Incoming Phone Call Overrides Intercom, Music, and Navigation Audio. ILM Bluetooth Helmet Supports <span class="a-text-bold">Intercom between Two Riders over a Distance of up to 1000 Feet.</span> Please storeit in th<span class="a-text-bold">e cool place. </span> In order to reach its maximum working potential, please charge the batteryregularly every month, even if you have not been using the product. Since the helmet hasnt been used for a long time and the battery is in the sleepmode. To activate the battery, user need to charge it for about half an hour. Extra battery box is available if the original one didn&#039;t work properly. The inner pads are<span class="a-text-bold"> replaceable and washable</span>. Please carefully select the size according to the size chart. If the size is not appropriate, we will send you a right liner soon. The liner determines the size of the helmet.