Product model code:K551LNCPU Family name:Core i7 CPU Model Number:i7-4510U Clock speed: 2000 MHzScreen size:15.6" Screen LED backlight:Yes Native resolution:1366x768 Memory (RAM):8GB Memory type:DDR3 Module form factor:204-pin SO DIMM Frequency speed:1600 MHzHDD Capacity:1TB Rotation speed:5400 rpmODD type:DVD Super Multi VGA card:NVIDIA GeForce GT 840MGraphics memory:2GB Integrated LAN:Gigabit KB language:ENG/RUS Battery cells:3 cells Input/Output connectors: DVI0 HDMI1 S-Video0 Audio-Out1 USB 2.01 USB 3.02 eSATA0 FW/13940 DC jack for AC addapter1 Dock station connector0 Express Card0 RJ451 Wireless connections: Wireless LAN802.11b/g/n BluetoothYes Card Reader:2-in-1Microphone:Built-in Speakers:Yes Built-in WebCam:Yes Operating System:Microsoft Windows 8.1 Unit Dimensions: Width380 mm Height22,5 mm Depth258 mmUnit Net Weight:2,4 kgUnit Gross Weight:3,34 kg