The DM-620 digital recorder from Olympus uses Voice Guidance to speak to you as you navigate its functions – including set up, folder organization and menu navigation. As a recorder, it is also loaded with functionality, including 1,000 hours of record time, an ultra high quality stereo microphone; recording, playback, and storage of MP#, WMA and PCM format files, 5 audio folders with 999 messages each, index marking, and variable playback speeds. Download files into a PC via included USB cable to further manage those files. Compatible with audible.com content. Comes with Olympus Sonority editing software for sound editing, file and podcast management. Uses 2 AAA rechargeable batteries (included). Has 4 GB internal memory with a micro SD slot to support upto 32 GB.