1.Pen & mp3 functions,playing music, A-B repeat, recording, etc. 2.Supports music files in MP1, MP2, MP3, WMA, WMV, ASF, and WAV formats. 3.Standard USB Port 4.7 EQ: Natural, Rock, POP, Classic, Gentle, Jazz, Bass are available. 5.Long time digital recording (recording time lasts for 35 hours for 128MB)，Support recording while recharging. 6.Firmware upgrading 7.High-powered rechargeable polymer lithium battery inside, long time playing. 8.Use four keys compositely, operation simply and conveniently 9.Double color LED lights instruct working status 10.Support recharging by USB or Charger