MacBook Air (4,2)

The MacBook air is a laptop designed and manufactured by Apple and runs Apple's Mac OS operating system.The MacBook Air (4,2) which is part of the mid 2011 release features a 13 inch display, the latest Intel Core i5 and i7 Processors, High Speed ThunderBolt connectors and runs Apple's latest Mac OS X 10.7 Lion.

The full MacBook Air (4,2) specifications follow:

OS	Mac OS X Lion
Size	Dimensions	(3.0-17.0) x 325 x 227 mm
	Weight	1.35 kg
Display	Type	LED backlit glossy
	Size	13.3 inches
	Resolution	1440 x 900
	Features	-
Memory	Internal	128 GB | 256 GB SSD
	External	SD Card
Connectivity	WLAN	AirPort Wi-Fi 802.11 a/b/g/n
	Bluetooth	v 4.0 EDR (Enhanced Data Rate)
	Infrared	No
	USB	2 x 2.0
Camera	Webcam	FaceTime Camera
Hardware	CPU*	1.7GHz dual-core Intel i5 3MB shared L3 cache
	GPU**	Intel HD graphics 3000
	Chipset	-
	RAM	4GB 1333MHz DDR3
	Audio	headphones omnidirectional microphone stereo speakers
	Video	-
	Sensors	light sensor
	Ports	Thunderbolt
	Others	backlit keyboard Multi-Touch trackpad
Software	Apple	iLife iWork (purchase required)
	Others	OS X Apps
Battery	50 Watt-Hour Li-Po
	Stand-by	30 days
	Usage	7 hours
	Playback
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*     up to 1.8GHz Intel Core i7 with 4MB shared L3
**   384MB of DDR3  shared memory