International advanced 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/TV/cell phones. Under the BT disconnection mode,device will be auto power-off within half hour.