Display 3.5-inch (diagonal) widescreen Multi-Touch display 480-by-320-pixel resolution at 163 ppi Support for display of multiple languages and characters simultaneously Audio Frequency response: 20Hz to 20,000Hz Audio formats supported: AAC, Protected AAC, MP3, MP3 VBR, Audible (formats 2, 3, and 4), Apple Lossless, AIFF, and WAV User-configurable maximum volume limit Headphones Stereo earphones with built-in microphone Frequency response: 20Hz to 20,000Hz Impedance: 32 ohms Video Video formats supported: H.264 video, up to 1.5 Mbps, 640 by 480 pixels, 30 frames per second, Low-Complexity version of the H.264 Baseline Profile with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; H.264 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Baseline Profile up to Level 3.0 with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; MPEG-4 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple ...