i-Ever Waterproof Mini Mushroom Wireless Bluetooth Speaker Audio Player For Smartphone Hands Free Silicone Sucker Suction (Blue) Bluetooth:Bluetooth 3.0, A2DP,HFP,HSP,CSR solution, high quality sound Silicon cover & ABS Plastic Driver:40mm, 4 3W; Built-in Battery: 300mAH, Li-ion battery Portable design,convient to take anywhere Function Key:Volume +/-, Dial up/Hang up; Built-in Microphone:Yes