... the electrocircuitIt can be used with computer, mobilephone,mp3,mp4 and various players Products accessories:1 pcs mini ... stone Disk U , TF card,mobilephone card, mp3,mp4,wma docs playerAux Mode can be receive CD ... Key functions that: Pls see instruction1.ON/OFF2.MODE3.P/SCAN4.VOL-/5.VOL+/ Speaker50mm speaker,4 0h ... for the last song,long for volume -6.P/SCAN Play/pause.short press to search next channel ...