... .7V Li batteryFeature:1,Automatically detects USB flash drive /TF card and play2,Fully compatible with USB 1.1/2.0 U disk3 ... ,Support TF card4,Support MP3,MPEG 1,MPEG2,LAYER35,With mini flash light5 ... ,With four functions to switch:TF,USB,AUX,FM radio6,Made of environmentally ...