Multifunctional: Supports wirelessly playing music via Bluetooth connection; also supports AUX IN, TF Card / U Disk music playback, and FM radio function. Surround Sound: Dual 3W speakers deliver multi-dimensional sound and an unparalleled cinematic deep bass surround sound; letting you enjoy high-quality music freely. Hands-free with Mic: Built-in high-definition microphone enables you to receive calls easily and makes your hands free when driving or doing exercise, more convenient and safer. Endurance Time: Built-in rechargeable 1000mA battery supports about 3.5 hours of working time. Powered by the Micro USB charge port using the included charging cable. Simple Operation: With buttons, easy to control power on / off, playing/ pausing, volume +/-, previous/next track, answering/ending calls, and switching modes.