TYSO USA(TM) 3 in 1 Accessories Bundle _ Waterproof Wireless Bluetooth Mini Mushroom Speaker With Power Bank and Charger (Black) (Black) Bluetooth:Bluetooth 3.0, A2DP,HFP,HSP,CSR solution, high quality sound Driver:40mm, 4 3W; Built-in Battery: 300mAH, Li-ion battery Function Key:Volume +/-, Dial up/Hang up; Built-in Microphone:Yes Silicon cover ABS Plastic Black Color