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DisplayHP ProBook 4540s E5R73US 
Screen Size15.60 "
Display Screen TypeActive Matrix TFT Color LCD
Aspect Ratio16:9
Screen ModeHD
Screen Resolution1366 x 768
Backlight TechnologyLED
Hard DriveHP ProBook 4540s E5R73US
Storage Size320 GB
Hard Drive InterfaceSerial ATA/300
Optical Drive TypeDVD-Writer
MemoryHP ProBook 4540s E5R73US
Memory Card SupportedSecure Digital (SD) Card, Secure Digital High Capacity (SDHC), Secure Digital Extended Capacity (SDXC), MultiMediaCard (MMC), MMCplus, Memory Stick
Standard Memory4 GB
Maximum Memory8 GB
Memory TechnologyDDR3 SDRAM
Memory StandardDDR3-1333/PC3-10600
Number of Total Memory Slots2
Memory Card ReaderYes
NetworkHP ProBook 4540s E5R73US
Wireless LANYes
Ethernet TechnologyGigabit Ethernet
BluetoothYes
Bluetooth StandardBluetooth 4.0
DimensionsHP ProBook 4540s E5R73US
Height1.1"
Width14.8"
Depth10.1"
Weight (Approximate)87.2 oz
ColorMetallic Gray
Detailed SpecsHP ProBook 4540s E5R73US
MicrophoneYes
SpeakersYes
ProcessorHP ProBook 4540s E5R73US
Processor ManufacturerIntel
Processor TypeCore i3
Processor Modeli3-3120M
Processor Speed2.50 GHz
Processor CoreDual-core (2 Core)
Cache3 MB
Chipset ManufacturerIntel
Chipset ModelHM76 Express
SoftwareHP ProBook 4540s E5R73US
Operating SystemWindows 7 Home Premium
Operating System Architecture64-bit
Input DevicesHP ProBook 4540s E5R73US
Pointing Device TypeTouchPad
TouchPad FeaturesMulti-touch Gesture
BatteryHP ProBook 4540s E5R73US
Battery ChemistryLithium Ion (Li-Ion)
InterfacesHP ProBook 4540s E5R73US
HDMIYes
Total Number of USB Ports4
Number of USB 2.0 Ports2
Number of USB 3.0 Ports2
VGAYes
Audio Line InYes
Audio Line OutYes