Product information:
Transmission range: 15 meters
Function: voice control, call function, support music
Bluetooth protocol: 5.0
Channel: Stereo
How to use: head-mounted
Single or dual ear: Bilateral stereo
Color: black+white
Bluetooth version: V5.0
Output power: 40mw
Speaker specifications: 40MM
Audio output: dual channel
Impedance: 32 ohms
Working voltage: 3.3V-4.2V
Sensitivity: 108dB/±3dB
Standby time: 20 hours
Kefeng Kefeng size: 4.0*1.5mm
Battery capacity: 350mAH with protection board

Product size: length 20.4cm, width 5.4cm, height 21.5cm

Package:
Wireless bluetooth headset x1