Size and weight Height: 9.56 inches (242.8 mm) Width: 7.47 inches (189.7 mm) Depth: 0.5 inch (13.4 mm) Weight: 1.5 pounds (0.68 kg) wi-fi model; 1.6 pounds (0.73 kg) wi-fi + 3g model Display 9.7-inch (diagonal) led-backlit glossy widescreen multi-touch display with ips technology 1024-by-768-pixel resolution at 132 pixels per inch (ppi) Fingerprint-resistant oleophobic coating Support for display of multiple languages and characters simultaneously Battery and power Built-in 25-watt-hour rechargeable lithium-polymer battery Up to 10 hours of surfing the web on wi-fi, watching video, or listening to music Up to 9 hours of surfing the web using 3g data network Charging via power adapter or usb to computer system Processor 1ghz apple a4 custom-designed, high-performance, low-power system-on-a-chip Nput and output Dock connector port 3.5-mm stereo headphone jack Built-in speaker Microphone Micro-sim card tray (wi-fi + 3g model only) Wireless and cellular Wi-fi model Wi-fi (802.11a/b/g/n) Bluetooth 2.1 + edr technology Wi-fi + 3g model Umts/hsdpa (850, 1900, 2100 mhz) Gsm/edge (850, 900, 1800, 1900 mhz) Data only2 Wi-fi (802.11a/b/g/n) Bluetooth 2.1 + edr technology Audio playback Frequency response: 20hz to 20, 000hz Audio formats supported: he-aac (v1), aac (16 to 320 kbps), protected aac (from itunes store), mp3 (16 to 320 kbps), mp3 vbr, audible (formats 2, 3, and 4), apple lossless, aiff, and wav User-configurable maximum volume limit