support SD card/USB Disk dual power supply by USB cable and Lithium battery with FM radio 3.5 AUX in and headphone jack Portable Stereo Digital Speaker Main Fuctions and Features:1. Multifunction music system,. Buid in MP3 music player,support flash memory driver,SD card,MMC card,plug and play the music in memory.2. Build in digital FM stereo radio function, with rotatable antenna, scan and save ...