*Put DC 5V Adapter connecting into charging port from this speaker backside to be charge*It can play TF card ‎,‎U disk with MP3 format files in memory‎,‎ FM functional‎,‎Frequency‎:‎87.5‎-108 MHz‎,‎With wireless bluetooth function*It can read memory as well to the machine and do not switch U disk/TF card*Put 3.5 audio input port connecting to‎"‎AUX‎"‎ can input external music sources and mobilephone ‎,‎MP3‎,‎MP4‎,‎PC etc audio sources device*Press‎"‎ MODE‎"‎button to be switch U disk‎,‎TF card and FM/AUX/Bluetooth‎.‎