Hamlet XMP3000. Player media type: flash-media, Total storage capacity: 0 GB, Compatible memory cards: SD/MMC. Audio formats supported: MP3. Weight: 25 g, Depth: 15 mm, Height: 62 mm. Operating temperature range (T-T): 0 - 40 °C. Battery type: AAA, Compatible operating systems: Win 98SE/ME/2000/XP MAC OS 9/10X, Standard interfaces: USB