The Smart HJC 10B Bluetooth Headset slides right into compatible models of HJC helmets so you can listen to music, hear GPS prompts and communicate with other Bluetooth headsets wirelessly. Bluetooth 3.0 provides excellent sound quality so you can stream clear audio from your BT enabled smartphone into your helmet. In open terrain the 10B will let you communicate with another rider as far as 400 meters (437 yards) away. Features:Talk time: 8 hoursOperating temperature: -10˚C - 55˚C (14°F - 131°F)Working distance: up to 400 meters in open terrainAudio Overlay: listen to music and use intercom simultaneouslyBluetooth:Accepts calls, GPS instructions and music while communicating with one other rider or passengerMulti-Pair Bluetooth intercomAudio Video Remote Control Profile (AVRCP)Bluetooth v3.0Audio:Advanced Noise ControlWide volume controlSample rate: max. 48 kHz (DAC)Battery:Type: Lithium polymerDevice can charge while in useFitment: The HJC Smart 10B Bluetooth Headset by Sena is designed to integrate with the following HJC helmets:RPHA 11 Pro Carbon RPHA 90 S CarbonRPHA 90 S RPHA 70 ST Carbon F70 i10 i90v90Includes both wired and boom microphones