Capacity of built-in 18650 battery：1500MA
Supply voltage: 5V
Output power: 7W
Loudspeaker: 2.5-inch, 4 Ohm, outside-magnetic
Frequency response: 100-18Khz
Bluetooth version: Shen Zhen Bluetrum Technolog- Bluetooth solution 5.1
Music player, telephone speaker
Taking pictures via the Bluetooth+ recording+ a key to delete+ priority to play the recording
Pressing the keys to adjust the volume
Recharge indicator+ LED digital display
Constant playing for 2-3 hours
Supporting FM radio, reading USB and TF card