This mini bluetooth speaker made of environment ABS has wireless bluetooth input, hands-free calls and mobile phone stents. The method of imprinting is silkscreen. It achieves bluetooth input, waterproof and free-hands phone calls. And this speaker brings you unforgettable using experience. You can customeizd your own logo. A micro USB cable is included. Highly water resistant. Quickly connects to and controls Bluetooth enabled digital players including almost smart phones. 10 meters wireless workable. Rechargeable lithium battery is built in to offer 4 hours of playtime.