It is a standard stereo headset that adapts CSR BC3 and conforms to Bluetooth V1.2 Supports headset and handfree Supports A2DP and AVRCP profile Applied to mobile phone, PDA and PC in accordance with Bluetooth function With stylish clip-on design, you can wear it on the chest freely and enjoy Bluetooth wireless speaking and excellent stereo effect If pairing with mobile phone and PC at the same time, when a call rings, Bluetooth headset will cut music and connect with mobile phone automatically and you can speak with headset When speaking is over, Bluetooth headset will connect with PC automatically not to miss any incoming call OLED screen display mark arrangement