Asus Zenbook UX31E-XH71 13-Inch Ultrabook (Intel Core i7-2677M,  4GB Ram,  128 GB SSD, 900x1600p LED display, Bluetooth, Windows 7 Professional) Silver Aluminum Actual UX31E & UX21E standby time may vary due to specific component performance, connected devices, and environmental differentiation. Spun metal and hairline aluminum finish throughout the entire chassis that only measures a minimum thickness of .12" and weighs only 2.87lbs 2nd Generation Intel Core i7-2677M processor with Intel Turbo Boost 2.0 Technology for smart multitasking that automatically senses what you're doing and boosts performance ASUS exclusive Super Hybrid Engine II with Instant On 2-second resume, double the standby time, automatic data backup and recovery, and 25% longer battery life SATA 128GB solid state drive for an amazingly smooth and fast computing experience SuperSpeed USB 3.0 for quicker device charging and up to 10x faster transfers than USB 2.0