USB slot on the front panel; auto play the MP3 files in USB' can connect with PC ,Mobile Phone , MP3 player,and iPod ,iPhone e USB slot on the front panel;auto play the MP3 files in USBwith class D Amplifier 5Wx2 ch THD 10%3.5mm Aux in , can connect with PC ,Mobile Phone , MP3 player,and iPod ,iPhone etcplay/pause,next,prev,vol-,vol+ 5 keys2.5"x2 speakerswith Power adaptors,DC 9V 1.5AMany colors ...