Mpman MP-CS155 512MB. Player media type: flash-media, Total storage capacity: 0.512 GB. Display diagonal: 38.1 mm (1.5 "). Audio formats supported: MP3 / WMA, Video formats supported: MP4. Weight: 42 g. Dimensions (WxDxH): 80 x 42 x 10 mm, Compatible operating systems: Win98/Me/2000/XP, Standard interfaces: USB