Marantz PMD620 Handheld SD MP3/WAV Recorder One Touch Stereo or Mono Recording Uses SD/SDHC Cards for Recording Uncompressed WAV or MP3 files 2 Condenser Microphones & Built-in Monitor Speaker 16-Bit or 24-Bit Linear PCM Recording at 44.1 or 48kHz Sample Rates for WAV Files Operates on 2-AA Alkaline or NiMH Batteries