Specification:

Bluetooth version: 4.2

Transmission distance: 10m

Output sensitivity: 92dB

Mic sensitivity: -42dB

Frequency response: 20-20000Hz

Battery capacity: 70mAh

Working time: about 3.5 hours

Standby time: about 100 hours

Charging time: about 1.5 hours

Resistance: 32Ω

Rated power: 30mW

Driver unit: 10mm

Cable length: 65cm