Description: 1.Support 2 bluetooth devices,handsfree calls,release uesr's hands 2.Wireless Bluetooth,out of the shackles of the headphone cable 3.USB standard high-capacity interface,easy to charge 4. more→High-definition sound, suitable for phone calls and listening to music (1)Main functions: Listen to music,Answer the phone,End calls,Reject calls,Last number re-dial,Three-position call (2)Application of microphone noise reduction technology,reduce the ambient noise and background noise, giving users a clear and natural talking experience (3)Built-in lithium battery, support handsfree call for a long time, Standard USB interface, can insert into the computer host port to charge or use the usual …