Bluetooth Headset with Microphone

1) Support Bluetooth V2.1 version,downwards compatible with V1.1,V1.2 version 2) Support A2DP function 3) AVRCP remote control capabilities 4) Supports automatic swithcover to incoming call function 5) With the end number redial function 6) Large and small volume adjustment 7) Forward,backward selections feature 8) Pause function 9) Minimum of external components 10) Compatible with RoHS standards 11) Operating voltage: 3.6V-4.2V 12) Rechargeable system