Portable Wireless Bluetooth Speaker, 5 Watt Strong Drivers - Amazing Deep Bass and Noise Cancellation High Quality and Stylish Design --- High-end zinc metal with electroplating and UV finish, total weight up to 210g. Dual-coil full 45mm driver to ensure loud, clear and rich audio experience. Big buttons more convenient. Built for portability. Amazing Deep Bass and Noise Cancellation --- Big 45mm vibrating diaphragm for dynamic and powerful bass. Build-in noise cancellation digital mic to ensure clear phone call. Digital amplifier --- Quality digital amplifier to ensure no break and distortion under low battery voltage. A class battery cell --- Build-in 500mAh PLB(not simple PIB) battery with soft pack to ensure a safe transportation and worry free from explosion. A class battery cell giving up to 6 hours of constant playback and 500 times charging lifespan. More Function --- Intelligent voice prompt, auto sleep for energy saving. Line in port and cable for use with non Bluetooth devices.