Function description Support SD/MMC card reading With USB 2.0 slot With fm tuner, function of auto search and broadcast station reserve Support clock, alarm clock and sleeping function Compatible with mp3/wma audio format Lcd display With keys of full function on panel Support one route aux input and stereo earphone output Support aa battery and bl-5c lithium battery and usb power supply Technical data: Support audio format decoding of mpeg-1, mpeg-2, mpeg-2.5, code rate 8-448kbs Support both mp3 and wma(code rate>5 kbs) Rms:3w * 2(l/r) S/n:88db Stereo isolation: -80db Drive: (2.5" 4ohm full range ) Passive radiator 5090*1 + 3050*2 Frequency response : 120hz~20khz(l/r) Pmpo: 90 watts Unit size: h92*w248*d64mm Packing size: h125*w275*d85mm Finish: abs material Power supply: dc 5v. Unit size: h92*w248*d64mm Packing size: h125*w275*d85mm