Wireless sports Bluetooth headset U8 binaural in-ear earphones 4.1 stereo

 - Model: U8

 - Bluetooth version : V4.1

 - Support:HSP/HFP/A2DP/AVRCP

 - Charging time: about 2 hours

 - Charging Voltage: DC 5V

 - Standby time: about 200 hours

 - Talk Time: 7 hours

 - Operation Range:10 meters

 - Sensitivity   : 104±3dB

 - Impedance: 32Ω±15%

 - Frequency range: 20~20000 Hz

 - Color: Black/White/Red+ Black