1) IECM-2 Recording with high-quality in MP3 format, (HP, SP, LP) mode(with two mic) 2) Professional high-sensitive stereo microphone 3) Supporting line-in record 4) Listening-in sound when recording 5) Original sound background will be represented while playing recording 6) VOR, oringinal sound record, no noise 7) Built-in clock, built in speaker 8) AGC(automotive gain control) to make a PO sound be prevented while shaking the item 9) Supporting FM frequency modulation 10) One key to switch Record/Music/FM mode 11) Second generation Time-mark Function(built in RTC, Record the time and mark to recording files automatically after recording 12) Not just be a digital voice recorder, also can be a music player, a FM radio&phone recorder 13) Data Protection (while sudden power off, can be saved automatically) 14) use two batteries, save power.