Lenovo Thinkcentre M83z All-In-One/21.5" Full HD /i3-4130/4GB/500GB HDD/DVDRW/Wlan/Cam/No KB/W8.1PdownW7P64/Warranty till 2017.05POWERed FOR PRODUCTIVITYOPTIMIZED FOR COLLABORATIONVERSATILE SPACE-SAVERROBUST SECURITY FEATURES FormFactor All-in-One PROCESSOR Intel i3-4130 ProccesorSpeed 3.40 GHz ProcessorMultiCoreType Dual Core Chipset Intel H81 Express Chipset FSB n/a CACHE 3 MB RAM 4 GB RAMinstalled_max 16 GB RAMSlotstotal_available 2 RAMSlotsFree 1 MemoryType DDR3 PC3-12800 1600 MHz HardDrive 500 GB StorageDeviceSpeed 7200 rpm QuantityofStorageDevices 1 StorageDeviceType HDD SATA RaidLevels n/a GraphicCard Yes GraphicsController Intel HD Graphics 4400 GraphicsControllerMemorySize n/a GraphicsControllerMemoryType Shared Audio Yes AudioFeatures High Definition (HD) Audio, Realtek ALC283CG / two internal stereo speakers (3watt x 2), Dolby Advanced Audio v2 certified, Microsoft Lync certified NetworkCard Yes Network 10/100/1000 Mbps NetworkCardType One gigabit ethernet port, Intel I217-V, Wake on LAN WirelessNetwork Yes Wireless b/g/n WirelessCardType Wi-Fi IEEE 802.11 b/g/n Bluetooth n/a OpticalStorage DVD+/-RW Monitor 21.5" (546.1mm) Full HD 1080p (1920x1080) TFT color, wide viewing angle (+/- 85°), LED backlight, 250 nits, 16:9 aspect ratio, 1000:1 contrast ratio, infinity display, work as standalone monitor via HDMI-in connector Keyboard No KeyboardType n/a Mouse Yes MouseType Enhanced Optical USB Mouse, black, Lenovo logo OperatingSystem Microsoft Windows 8.1 Pro / Microsoft Windows 7 Professional 64 Security Chip Trusted Platform Module (TPM 1.2)USB Individual Disable/EnableComputrace Support/Kensington Slot Asset ID ManagementFeatures n/a SoftwareIncluded n/a Width 396 mm Depth 94 mm Height 540 mm WEIGHT 7.500 Kg Warranty 2 years ExpansionBays n/a ExpansionPorts 4 x USBRJ-45HDMIVGA ExpansionPortsFront 2 x USB 3.0Audio in / out ExpansionSlots n/a CardReader Yes SupportedFormats n/a Localization n/a