DM-620 Digital Recorder Silver 4GB Offers 3 recording formats, allowing you to record in MP3, WMA or PCM format. TRESMIC 3 microphone system captures a wide range of stereo sounds. Allows fast file transfers to a compatible computer, plus lets you charge the battery when connected to select devices. Equipped with voice guidance to help you navigate the device through audible directions. 4GB of built-in memory stores up to 1,007 hours of continuous audio for recording dozens of lectures and notes. Features a microSD card slot for simple storage expansion.