Sony 1GB Hi-MD WALKMAN. Player media type: MiniDisc, Total storage capacity: 1 GB. Continuous audio playback time: 17 h. Weight: 85 g. Bundled software: SonicStage 2.0. Dimensions (WxDxH): 81.7 x 76.1 x 14.8 mm, Connectivity technology: Wired, File type: MP3, WMA, WAV, ATRAC3, ATRAC3plus