Push one button to record/pause/stop/playback/Delete/Back Material: ABS plastic Recording format: PCM--WAV, 1536kbps ,HQ (high quality)--MP3, 192kbps SQ (standard quality)--MP3, 128kbps Noise cancellation, Voice activated, Timer recording, Hearing aid. Lock buttons while recording Recorded file name will be saved by year/month/date/hour/minute Line-in input, support telephone recording A-B repeat, edit the recording file: T-MARK (divide long recording file into several parts) Built in two stereo microphone Built in diameter 28mm high quality speaker 4/8/16GB memory inside and external micro SD card(up to 64GB) 8GB memory capacity up to 146hours for SQ recording (MP3 128kbps) Screen: segment LCD backlit display Support music playback format: WMA,WAV,MP3,FLAC,APE, 7 levels of Equalization. Power supply:2X AAA batteries. Battery life for recording: About 40hours for PCM, 55hours for HQ, 50hours for SQ. FM tuner and FM recording Dimension:110*39*18mm Accessories: Manual, Earphone, USB cable,external MIC, Strap, 2*AAA Batteries