OVLENG wireless headset

Transmission distance: less than or equal to 10m
Battery capacity: 300mAh
Charging voltage: DC5V
Speaker diameter: φ40mm
Impedance: 32Ω
Working time: 4-6h playing music, 8-10h talk time
Bluetooth version: 5.0
Microphone: Outside
Rated power: 100mw
Working voltage: DC3.7V
Frequency range: 20-20KHz