Product model code:X553MACPU Family name:Celeron CPU Model Number:N2830 Clock speed:2166 MHzScreen size:15.6" Screen LED backlight:Yes Native resolution:1366x768 Screen type:Glossy Memory (RAM):4GB Max memory (RAM):8GB Memory type:DDR3 Module form factor:204-pin SO DIMM HDD Capacity:500GB Rotation speed:5400 rpmODD type:None Graphics memory:Integrated Integrated LAN:10/100 KB language:ENG Battery cells:3 cells Input/Output connectors: 15pin D-sub1 DVI0 HDMI1 S-Video0 Audio-In1 Audio-Out1 USB 2.01 USB 3.01 eSATA0 FW/13940 DC jack for AC addapter1 Dock station connector0 Express Card0 RJ451 Wireless connections: Wireless LAN802.11b/g/n BluetoothYes Card Reader:SD/SDHCMicrophone:Built-in Speakers:Yes Built-in WebCam:Yes Operating System:Microsoft Windows 8.1 Colour:Black Unit Dimensions: Width280 mm Height25,3 mm Depth252 mmUnit Net Weight:2,2 kgUnit Gross Weight:2,78 kg