Bluetooth headset HQ sound quality Black

Bluetooth: 5.4
Playtime ：36 hours

model: BH03-02
Color: Black/White
Bluetooth version: JL7003/5.4
Battery capacity: 300mAh
Charging time: 3H
Standby time: about 3 years
Play time: 60% volume folk song 36H
Transmission distance: 10-15M
Speaker size: Φ40mm
Speaker sensitivity: 123 ± 3db
Impedance: 32 Ω
Frequency range: 20Hz-3kHz ± 3db
Microphone sensitivity: 32 ± 3db
Rated input (charging condition): 200mA
Audio interface: diameter 3.5