FEATURES: 1. 4-in-1 function, support play music from USB Drive/SD Card, and FM Radio & Line-in audio input. 2. Play MP3 format music from SD/MMC card & USB disk, Frequency Response 87.5-108MHz, >=80dB. 3. No need to shift between U disk/SD/MMC card, speaker automatically reads the memory plug in. 4. Connect 3.5 stereo audio cable to the socket of ¡°LINE IN¡±, you can play music sources from mobile phone, mp3, mp4, PC and other audio devices. 5. FM: automatically search and store stations under FM mode. 6.