Bluetooth Version: V5.0

Built-in lithium battery:800Mah

Speaker Size:52mm*2

Speaker Power:3W*2

Charging Voltage :DC5V

Charging Time:about 2.5h

Playing Time:about 3.5h

Bluetooth Distance 10M, call hands-free function

Support :TF/USB/FM/BT/AUX

 ESB8248B factory cheap portable bluetooth wireless speaker