DESC: Product Features: Interface: USB 2.0; Storage Capacity: 4 GB; Screen Size: 1.8 inch; Main Storage Type: Built-in Memory; Number of Songs: 1000; Usage: Music, Photo Viewing, Video; Audio Format: AAC, MP3, MP3 VBR, WMA, WMA (DRM); Video Format: DVR-MS, H.264, M4V, MPEG-4, WMV; Max Video Resolution: 320 x 240; Outputs: Composite x 1, Headphone Jack; Additional Features: FM Stereo Tuner, Games, Upgradable Firmware; Battery Life: Up to 24 Hours; Battery Type: Rechargeable Li-ion Battery; Power Source: Internal Battery; Depth: 0.33 in.; Height: 3.6 in.; Width: 1.63 in.; Weight: 1.7 oz.; Weight and Size: Compact; Family Line: Microsoft Zune HD