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DisplayLenovo ThinkPad T420s 4173AP4 
Screen Size14.00 "
Display Screen TypeActive Matrix TFT Color LCD
Aspect Ratio16:9
Screen ModeHD
Screen Resolution1600 x 900
Backlight TechnologyLED
Graphics Controller ManufacturerIntel
Graphics Controller ModelHD 3000
Graphics Memory TechnologyDDR3 SDRAM
Graphics Memory AccessibilityShared
Hard DriveLenovo ThinkPad T420s 4173AP4
Storage Size320 GB
Hard Drive InterfaceSerial ATA/300
Hard Drive RPM7200
Optical Drive TypeDVD-Writer
MemoryLenovo ThinkPad T420s 4173AP4
Memory Card SupportedMultiMediaCard (MMC), Secure Digital (SD) Card, Secure Digital High Capacity (SDHC), Secure Digital Extended Capacity (SDXC)
Standard Memory4 GB
Maximum Memory8 GB
Memory TechnologyDDR3 SDRAM
Memory StandardDDR3-1333/PC3-10600
Number of Total Memory Slots2
Memory Card ReaderYes
NetworkLenovo ThinkPad T420s 4173AP4
Wireless LANYes
Wireless LAN ManufacturerIntel
Wireless LAN ModelCentrino Advanced-N 6205
Wireless LAN StandardIEEE 802.11a/b/g/n
Ethernet TechnologyGigabit Ethernet
BluetoothYes
Bluetooth StandardBluetooth 3.0
DimensionsLenovo ThinkPad T420s 4173AP4
Height1.0"
Width13.5"
Depth9.1"
Weight (Approximate)58.88 oz
ColorBlack
Detailed SpecsLenovo ThinkPad T420s 4173AP4
WebcamYes
MicrophoneYes
Finger Print ReaderYes
SpeakersYes
ProcessorLenovo ThinkPad T420s 4173AP4
Processor ManufacturerIntel
Processor TypeCore i5
Processor Modeli5-2540M
Processor Speed2.60 GHz
Processor CoreDual-core (2 Core)
Cache3 MB
Chipset ManufacturerIntel
Chipset ModelQM67 Express
SoftwareLenovo ThinkPad T420s 4173AP4
Operating SystemWindows 7 Professional
Operating System Architecture64-bit
Input DevicesLenovo ThinkPad T420s 4173AP4
Pointing Device TypeTrackpoint, TouchPad
TouchPad FeaturesMulti-touch Gesture
I/O ExpansionsLenovo ThinkPad T420s 4173AP4
Expansion Slot TypeExpressCard/34
BatteryLenovo ThinkPad T420s 4173AP4
Battery ChemistryLithium Ion (Li-Ion)
Maximum Battery Run Time5.50 Hour
InterfacesLenovo ThinkPad T420s 4173AP4
Total Number of USB Ports3
Number of USB 2.0 Ports2
Number of USB 3.0 Ports1
VGAYes
Audio Line OutYes
DisplayPortYes