Features: [BT 4.0] This speaker supports BT device with A2DP function. Integrated with BT, it can be connected with BT devices within 10 meters. [Multi-functional Speaker] Multi-functional speaker allows to switch modes between BT mode, TF card mode, Line in mode and USB mode. Usb interface can only read usb flash drive. [High Fidelity Sound Quality] Enjoy crisp and clear audio with impressive 360Surround Sound powered by four 10W acoustic drivers. [Hands-Free] BT function supports hands-free call. Remote control for convenient experience. [Wall-mounted Design] Wall-mounted design to save more space, and can provide more immersive voice.