MPN MC540BT/A, MC540FD/A, MC540LL/A, MC540ZP/A Key Features Storage Capacity 8 GB Audio Supported Formats AAC, AIFF, HE-AAC, MP3, MP3 VBR, WAV Video Supported Formats H.264, M-JPEG, M4V, MP4, Mov Battery Run Time Up to 40 Hours Audio / Video Capabilities MP3 Bit-Rate 8 kbps - 320 kbps Max Video Resolution 960 x 640 Screen Size 3.5 Inch Dimensions Width 2.3 Inch Depth 0.28 Inch Height 4.4 Inch Weight 3.56 Oz Connectivity Interfaces USB 2.0 Miscellaneous Power Source AC/DC Adapter, Internal Battery, Rechargeable via USB cable Battery Type Rechargeable Li-ion Battery Number Of Songs Up to 8000 Exterior Color Black Frequency Response 20-20000 Hz