Features: Bluetooth V4.0; Easy NFC pairing  Yes or No voice recognition to answer or reject call; Voice dialing; Voice operation.  Multipoint connection, keep 2 devices linking at the same time.  Built-in microphone, rechargeable battery, micro USB charging port  Easy to enjoy wireless music and calling control function ..

Size:40*40*16.5 mm Bluetooth version:Bluetooth 3.0 Bluetooth protocol:A2DP AVRCP HFP protocol Bluetooth effective distance:10 meters Built-in amplifier output:Stereo 80mW * 2 Additional features:NFC Operating peak current: 30mA Operating Current:20mA Charging voltage:DC5V Charging current:60mA Continuous working hours:5.5H Sleep Current:50uA Standb..