echnical specification:

Drivers: 57mm speaker X 2

Transducer type: dynamic
Bluetooth version: V4.1

Frequency range: 2.4GHz-2.48GHz

Operating distance: up to 10m (free space)

Bluetooth profiles: A2DP，AVRCP，HSP，HFP

Impedance: 16Ω

Frequency response: 20Hz-20kHz

Sensitivity: 110dB

Distortion:<0.1%(THD)

Music playtime: up to 40 hours

Talk time: up to 45 hours

Standby time: up to 1625 hours

Charging time: about 2 hours