Transmission range: 10 meters<br />Function: support music・ voice control・ multipoint connection・ voice prompt<br />Bluetooth protocol: 4.1<br />Channel: stereo<br />Use: ear<br />Whether single ears: bilateral stereo<br />Color: black・ white・ tyrant gold・ rose gold<br />Model: K1<br />At the same time to connect the 2 mobile phone support: support<br />Bluetooth 4.0・bluetooth headphones・Bluetooth Head・setsstereo bluetooth headset・Bluetooth・Bluetooth Stereo Headset・wireless