ipad和ipad 2的参数比较

概述Technical specifications Further information:  iPad technical specifications Model iPad (original) iPad 2 Announcement date January 27, 2010[27] March 2, 2011[86] US Release date April 3, 2010[3] Marc Technical specifications Further information:  iPad technical specifications

Model		iPad (original)	iPad 2
Announcement date		January 27,2010[27]	march 2,2011[86]
US Release date		April 3,2010[3]	march 11,2011[87]
discontinued date		[citation needed]	In production
Display		9.7 inches (25 cm) multitouch display at a resolution of 1024 × 768 pixels with LEDbacklighting and a fingerprint and scratch-resistant coating[12]
Processor		1 GHz Apple A4 system-on-a-chip[13]	1 GHz (dynamically clocked) dual-core Apple A5 system on a chip
Memory		256 MB DDR RAM built into Apple A4 package[14]	512 MB DDR2 (1066 Mbps data rate) RAM built into Apple A5 package[15]
Storage		16,32,or 64 GB[12]
Wireless	Wi-Fi	Wi-Fi (802.11a/b/g/n), Bluetooth 2.1+EDR[12]
	Wi-Fi+3G	3G cellular HSDPA,2G cellular EDGE on 3G models Geolocation		Wi-Fi,[12] Apple location databases[88]
Assisted GPS,Apple databases,[88] Cellular network Environmental sensors	Accelerometer, ambient light sensor,magnetometer[12]	Additionally: gyroscope
Operating system		iOS 4.3.5[89]
Battery		Built-in lithium-ion polymer battery;(10 hours vIDeo,[12] 140 hours audio,[90] 1 month standby[91])
Weight		Wi-Fi model: 680 g (1.5 lb) 3G model: 730 g (1.6 lb)	Wi-Fi model: 601 g (1.32 lb) GSM 3G (AT&T) model: 613 g (1.35 lb) CDMA 3G (Verizon) model: 607 g (1.34 lb)
Dimensions		9.56×7.47×.528 in (243×190×13.4 mm)[12][92]	9.5×7.31×.346 in (240×186×8.8 mm)[92]
Mechanical keys		Home,sleep,volume rocker,variable function switch (originally screen rotation lock,mute in iOS 4.2,either in 4.3) Camera		Back	N/A	720 p HD still and vIDeo camera 30fps and 5x digital zoom
Front	VGA-quality still camera

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