Apple iPod touch 16 GB black (4th generation) It has up to 40 hours of audio playback or 7 hours of video playback on a single charge 3.5-inch (diagonal) widescreen Multi-Touch display with 960-by-640-pixel resolution (326 pixels per inch) Support for AAC, Protected AAC (iTunes Store), MP3, MP3 VBR, Audible, Apple Lossless, AIFF, and WAV audio formats; H.264, MPEG-4, and Motion JPEG video codecs in M4V, MP4, MOV, and AVI formats 960-by-640-pixel resolution (326 pixels per inch). Bluetooth 2.1 + EDR Up to 40 hours of audio playback or 7 hours of video playback on a single charge.