Operating altitude: tested up to 10,000 feet. Relative humidity: 0% to 90% noncondensing. Operating temperature: 50° to 95° F (10° to 35° C). 60W MagSafe Power Adapter with cable management system MagSafe power port. Built-in 63.5-watt-hour lithium-polymer battery. Multi-Touch trackpad for precise cursor control supports inertial scrolling, pinch, rotate, swipe, three-finger swipe, four-finger swipe, tap, double-tap, and drag capabilities. Full-size backlit keyboard with 78 (U.S.) or 79 (ISO) keys, including 12 function keys and 4 arrow keys (inverted “T” arrangement) with ambient light sensor. Support for audio line out (digital/analog). Support for Apple iPhone headset with remote and microphone. 802.11n Wi-Fi wireless networking 3 IEEE 802.11a/b/g compatible. 
HDMI audio and video output using third-party Mini DisplayPort to HDMI Adapter (sold separately). Dual-link DVI output using Mini DisplayPort to Dual-Link DVI Adapter (sold separately). VGA output using Mini DisplayPort to VGA Adapter (sold separately). DVI output using Mini DisplayPort to DVI Adapter (sold separately). Dual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 2560 by 1600 pixels on an external display, both at millions of colors. 2.9GHz dual-core Intel Core i7 processor (Turbo Boost up to 3.6GHz) with 4MB 元 cache. 
2.5GHz dual-core Intel Core i5 processor (Turbo Boost up to 3.1GHz) with 3MB 元 cache.13.3-inch (diagonal) LED-backlit glossy widescreen display with support for millions of colors.
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