Play back：WMA/MP3 Encoding：MP3/WMA 3D Surround Sound：Support "SRS" 3D Surround Sound effect（only available under license） FM： Stereo FM Tuner 87.5 ? 108.0 MHz　　 FM Recording：Support recording directly from FM playing into MP3 format　　 Mic Recording：Support Mic recording into MP3 format VAD：Support "Voice Auto Detect" function when Mic recording Card Reader：Support Card Reader function Extension Memory：Support SD/MMC music file play back Firmware Upgradeable：Yes Lyrics：Support Lyrics display EQ Mode：5 EQ Modes, "Normal", "Jazz", "POP", "Rock", "Classic" & "User Define" A-B Repeat：Support A to B play repeatedly