Military-Specification Testing & Extra Durability: Lenovo ThinkPad X131E Laptop, 11.6" HD LED-Backlit, Intel Core i3-3227U Dual-Core, 4GB DDR3, 320GB SATA, 802.11n, Bluetooth, Win8 Pro - White 11.6" HD WXGA Anti-Glare LED-backlit display with 1366 x 762 resolution showcases movies and games in stunning clarity 4GB DDR3 memory - For multitasking power, supports up to 8GB Get reliable performance from the Intel Core i3-3227U 1.9GHz Dual-Core processor Military-Specification Testing & Extra Durability Features: Validates the ruggedness, durability, and quality of ThinkPad products by testing against eight parameters: high pressure, humidity, vibration, high temperature, temperature shock, low pressure (15,000 ft), low temperature, and dust. ThinkVantage Active Protection System (APS): For models with traditional hard drives, an accelerometer detects movement and stops the drive when a fall or similar event is detected. Rubber mounts are used for the hard disk drive (rather than rails) and the HDD connector is not rigidly attached to the board, so the connector absorbs shock and impact and protects against system damage.