Bluetooth version: v2.1+EDR
Horn: 45mm*1 diaphragm 
Rated power: 3W
Transmission distance: 10 meters
Battery capacity: 600mA
Rated voltage: 5V DC
Bluetooth calls: supported
Line audio: TF card function, FM radio function
Charging time: 3hrs
Playback time: 3-5hrs
Product material: ABS plastic+ iron mesh+ silicone pad
Product color: black/white/red/blue