KOGI-HB9183

Bluetooth Version:  V4.2+EDR
Driver Unit :   Φ40mm 
Impedance:     32Ω 
Sensitivity:     105 ±3dB 
Receiver Distance:  Up to 15 meters 
Music Time:     Up to 10 hours
Frequency Response: 20-20 KHz 
Charging Time:     2 hours
Battery:     Inbuilt Rechargeble Lithium-battery(3.7V/300mAh)
Colour:        Black, Blue, Green, Red

Features:     Blutooth, Sensitivity Microphone, Volume Control