Asus' entry for the Ultrabook market boasts longer battery life compared to most other competing models, thanks to Asu's energy-conserving Super Hybrid Engine technology. The 11.6-inch model also comes with instant-on technology that resumes the system in about two seconds, as well as a standby mode that will last up to 10 days. At 0.67 inches at its thickest point, the Zenbook UX21 is one of the thinnest models around. It also comes with Intel's Sandy Bridge Core processors (i3, i5 or i7), up to 4 GB of memory, and up to 256 GB of SSD storage. It also comes packed with plenty of I/O ports like USB 3.0 and micro-HDMI. The Zenbook also comes with Asus' SonicMaster technology for higher quality audio performance. Following are ZENBOOK features:

Incredible Beauty

The ZENBOOK™ uses a precision-crafted design measuring only 3mm at the front and 9mm at the rear. The form features razor thin edges and a curved center section, which is both practical and attractive – while accommodating the powerful computing components within, this design also looks totally unique. It embodies beauty and strength in complete balance and harmony.

Incredible Responsiveness

Exclusive ASUS Super Hybrid Engine II with instant on enables 2-second resume of the notebook from sleep, with up to two weeks* of standby time with open files and other pending data kept safe in memory. Plus, automatic data backup when the battery reaches 5% charge further helps secure your work. ASUS ZENBOOK™ keeps energy saving front and center with a dedicated Battery Saving Mode, which conserves power whenever possible to increase battery life by as much as 25%. You’re also always in the know when it comes to the battery thanks to ASUS PowerWiz, a utility that shows exactly how much charge is left per application – web browsing, movie watching. ASUS ZENBOOK™ combines power, efficiency, smooth usage and user empowerment, all on in one sleek package.

Incredible Performance

ASUS is proud to deliver the world’s first ultrabook with SATA 6Gb/s solid state storage, making for an amazingly smooth and fast computing experience. Additionally, all ASUS ZENBOOK™ models ship with USB 3.0 as standard, multiplying the transfer rates of current USB 2.0 by as much as a factor of ten! Combined, SSD storage and USB 3.0 create incredible speed of data transfer rates.

Incredible Audio

Another ASUS exclusive, SonicMaster technology was co-developed with Bang & Olufsen ICEpower® to deliver breathtaking, lifelike audio that far exceeds the limitations of conventional notebook PC sound performance. Deeper, more impactful and wider in range, SonicMaster delivers four times the sound output of other ultrabooks without increasing the size or weight of the form factor.