Lenovo High Performance 11.6-Inch ThinkPad Yoga Convertible IPS Touchscreen Laptop (Intel Celeron Quad-Core Processor, 4GB RAM, 128GB SSD, 802.11AC, Bluetooth, Webcam, HDMI, Windows 10) Rugged Durability. This Thinkpad Yoga laptop is designed to have rubber bumper around the top cover, which absorbs the force of side bumps. Its corners are 50% stronger, to reduce damage when dropped at an angle. The bezel is thicker, to protect the LCD panel. Its stronger rear cover reduces accidental LCD damage. Its hinges and brackets have been strengthened, to last 50,000 cycles and to withstand more force to the cover. This Thinkpad Yoga laptop is really a tough machine. Tested To Military Specifications. This Thinkpad Yoga laptop has been tested to meet the Military-Specification, which validates its ruggedness, durability and quality. It's tested against 10 parameters: high pressure, humidity, vibration, high temperature, temperature shock, low pressure, low temperature, solar radiation, fungus and dust. 128GB flash-based solid state drive (SSD), which has no moving parts, resulting in faster start-up times and data access, no noise, and reduced heat production and power draw on the battery; Intel quad-core N3150 processor (2M cache 1.60GHz, burst up to 2.08GHz), Intel HD Graphics, 4GB 1600MHz DDR3L memory expendable to 8GB, no optical drive. 11.6" LED-backlit IPS touchscreen HD (1366 x 768) display; low-light-sensitive, 720p HD webcam with face-tracking, plus dual digital-array microphones, Dolby advanced audio with build-in stereo speakers; 802.11 ac dual band Wi-Fi, Bluetooth 4.0, 2 USB 3.0, 1 Ethernet RJ-45, 1 combo headphone/Mic Jack, 1 HDMI. Windows 10 Home 64-bit, battery life up to 11.5 hours, color black, weight 3.5 lb, measure 0.90 thin.