Specifications:
Wireless version: V5.1
Working distance: Up to 10m
Impedance: 32Ω±15%
Driver: 40mm
Frequency: 20Hz-20000Hz
Battery: 300mAh, Rechargeable
Talking/play time: About 20 hours
Standby time: Up to 200 hours
Non-replaceable lithium ion-polymer
Power requirement: DC 5V 1A