Sony Compact Digital recorder. Maximum recording time: 185 h, Playback time: 18.5 h. Internal memory: 512 MB. Recording battery life: 29 h. Weight: 70 g. Dimensions (WxDxH): 30.8 x 14.9 x 119.3 mm, Battery type: AAA, Compatible operating systems: Windows 2000, Windows 98, Windows Me, Windows XP