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® CoreTM 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

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Compare ASUS Zenbook UX31E-XH71 13.3-Inch Thin and Light Ultrabook with Windows 7 Professional (Silver Aluminum) Vs Sony Vaio S Series 13" Laptop- Red