Features: [360 Degree Surround Sound]: Drived by 2 * 5W horns, A5 delivers 360crisp and clear stereo sound that brings you live performance. [BT 4.2]: The BT 4.2 ensure quick pair, steady transmission and wide compatibility, can be connected with any BT devices within 10 meters. [Multifunctional Speaker]: Multifunctional speaker makes you easily switch from BT mode, FM mode, TF/USB mode and line-in mode, multi choices satisfy your different needs. [Long Duration Time]: Built-in 2200mAh high capacity rechargeable lithium-ion battery supports up to 6-8 hours play time, automatically power off after 20 minutes standby. [Hands-Free Call]: BT 4.2 function supports hands-free call. Remote control for convenient experience, set your hands free.