Bluetooth Version: V4.2

Driver Unit:Φ40mm 

Impedance: 32Ω 

Sensitivity: 105±3dB 

Frequency Response:20Hz-20kHz

Receiver Distance: Up to 10 meters 

Music Time:Up to 10 hours

Talk Time:Up to 5 hours

Charging Time:2 hours

Charging:USB 2.0

Support: TF/Micro-SD card

Battery:Rechargeble Lithium-battery(3.7V/300mAh)

Features:Sensitivity Microphone,Volume Control , Bluetooth, etc.

Clours:Black,  Pink, Red, Purple, Green,Blue, Orange