Apple iPad Air Wi-Fi vs Apple iPad 4th generation Wi-Fi vs Apple iPad 2 Wi-Fi + 3G comparison

Compare Apple iPad Air Wi-Fi
Compare Apple iPad 4th generation Wi-Fi
Compare Apple iPad 2 Wi-Fi + 3G
key specs
Display9.70-inch9.70-inch9.70-inch
Processor1.3GHz1.4GHz1GHz
Front Camera1.2-megapixel1.2-megapixel0.3-megapixel
Resolution1536x2048 pixels1536x2048 pixels768x1024 pixels
RAM1GB1GB512MB
OSiOS 7iOS 6iOS 4
Storage16GB16GB16GB
Rear Camera5-megapixel5-megapixel0.7-megapixel
Battery Capacity8820mAh11560mAh6930mAh
general
Release dateSeptember 2013October 2012March 2011
Dimensions (mm)240.00 x 169.50 x 7.50241.20 x 185.70 x 9.40241.20 x 185.70 x 8.80
Weight (g)469.00652.00607.00
Battery capacity (mAh)8820115606930
Removable batteryNoNoNo
Alternate names-iPad 4-
display
Screen size (inches)9.709.709.70
TouchscreenNoNoNo
Resolution1536x2048 pixels1536x2048 pixels768x1024 pixels
Pixels per inch (PPI)264264132
hardware
Processor1.3GHz1.4GHz1GHz
RAM1GB1GB512MB
Internal storage16GB16GB16GB
Expandable storageNoNoNo
Expandable storage type-microSDmicroSD
camera
Rear camera5-megapixel5-megapixel0.7-megapixel
Front camera1.2-megapixel1.2-megapixel0.3-megapixel
software
Operating systemiOS 7iOS 6iOS 4
connectivity
Wi-FiYesYesYes
Wi-Fi standards supported802.11 b/g/n--
GPSNoYesYes
BluetoothYesYesYes
Bluetooth version4.00--
NFCNoNoNo
InfraredNoNoNo
USB OTGNoNoNo
Headphones3.5mm3.5mm-
FMNoNoNo
Number of SIMs1-1
sim 1
3GNo-Yes
4G/ LTENo-No
SIM Type--Micro-SIM
GSM/CDMA--GSM
sensors
Compass/ MagnetometerYesYesYes
Proximity sensorNoNoNo
AccelerometerYesYesYes
Ambient light sensorYesNoNo
GyroscopeYesYesYes
BarometerNoNoNo
Temperature sensorNoNoNo