4-inch (diagonal) widescreen display with Multi-Touch IPS technology. Retina display, 1136-by-640-pixel resolution at 326 pixels per inch, 800:1 contrast ratio (typical), 500 cd/m2 max brightness (typical), Fingerprint-resistant oleophobic coating. Input and Output: Lightning connector, 3.5-mm stereo headphone jack, Built-in speaker, Microphone.
802.11a/b/g/n Wi-Fi (802.11n 2.4GHz and 5GHz), Bluetooth 4.0, Maps: Location-based service4, Nike+ support built in. Audio Playback: Frequency response: 20Hz to 20,000Hz Audio formats supported: AAC (8 to 320 Kbps), Protected AAC (from iTunes Store), HE-AAC, MP3 (8 to 320 Kbps), MP3 VBR, Audible (formats 2, 3, 4, Audible Enhanced Audio, AAX, and AAX+), Apple Lossless, AIFF, and WAV, User-configurable maximum volume limit.
FaceTime HD camera with 1.2MP photos and HD video (720p) up to 30 frames per second, Face detection, Tap to control exposure for video or stills, Photo and video geotagging over Wi-Fi. Power and Battery: Built-in rechargeable lithium-ion battery, Music playback time: Up to 40 hours when fully charged, Video playback time: Up to 8 hours when fully charged, Charging times: Fast charge in about 2 hours (80% capacity), full charge in about 4 hours.