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