HP has unveiled its latest Ultrabook, the HP Envy 14 Spectre, which features a sleek glass design.

The 14in ultrabook, which HP posted a teaser video of online last week , is 20mm thick and weighs 1.8Kg. It benefits from a scratch resistant glass lid and is powered by an Intel Core i5 or i7 processor that features Intel Rapid Start Technology to speed up boot times.

Ultrabooks are a new category of thin and light laptops, which were introduced by Intel last year. The laptops, which are laptops under 20mm (0.8in) thick, "marry the performance and capabilities of today's laptops with tablet-like features" and are designed to offer a happy medium between laptops and tablets.

The laptop also comes with 4GB of ram, a webcam and a HP Radiance Backlit keyboard that features an individual LED for each key that will light-up when a finger hovers near them, and dim down when the prescence is removed. A 128GB solid state drive (SSD) provides plenty of storage space and the laptop also comes equipped with Gigabit Ethernet, USB 3.0, HDMI and Mini Displayport connectors. HP says users will benefit from a nine-hour battery life and Beats Audio speakers and technology that ensures users can stream music stored on the laptop to audio devices wirelessly.

Tthe HP Envy 14 Spectre also comes bundled with full versions of Adobe's Photoshop and Premier Elements, as well a two-year licence for Norton Internet Security software. HP didn't reveal which Windows operating system the laptop will run, although whether it will be released before the final version of Windows 8 is launched remains to be seen.

"Sleek, midnight black glass on the outside and stark contrast silver on the inside make Spectre extraordinary, defying conventional notebook design," said Louis Perrin, director, consumer products, Personal Systems Group, HP EMEA.

"We chose the name for our first Envy Ultrabook to evoke mystery and to satisfy those who expect the unexpected."

The HP Envy 14 Spectre Ultrabook will be made available at the end of March and will be priced from £1,199.