Sony Nwz-a815 (2 Gb) Digital Media Player 2GB Built-in Memory1 stores up to 440 songs2 or 7H 10M of video Compatible with Secure Windows Media Audio Video Codec Support: MPEG 4, AVC Baseline Battery Life: up to 33 hours of audio playback , up to 8 hours video playback High Quality Video Playback at 30 frames per second