Driver Size : 40mm
Impedance : 32ohm
Sensitivity : 19db
Frequency Response : 20hz - 20khz
Wireless Operating Range : Up To 15m
Built In Rechargeable Battery : 200mah
Lithium Polymer Battery : A Level
With Protective Plate Working Time : Up To 10 Hours At 70% Volume
Standby Time : Approx. 200 Hours
Charging Time : 2.5 Hours