International advanced cable for BT chip and circuit design techniques,support all wireless devices. With FM function, can search radio station broadcast automatically With Hi-Fi speaker, to make sure the clear and bright sound. Support Micro SD card and USB card, play MP3 format audio. The wireless working distance is 10 meters . With AUX line in, can directly connect the outside devices, for example, tablet PC/cell phones. Under the BT disconnection mode, device will be auto power-off within half hour