Microsoft unveils new tablet pc

Microsoft is to launch two new Surface tablet computers and several accessories as it tries to boost its tablet business as sales of traditional desktop and laptop computers decline.

The Surface Pro 2, which has been unveiled in New York, is targeted at professionals who want the full power of laptops in a tablet-style device. The kickstand built into the device is redesigned to make it easier to use on laps. In the past, it worked best on a flat surface such as a table.

Microsoft says the Pro 2 also offers a 75% improvement in battery life over the previous model. There's also a new cover accessory that extends battery life even further.

An optional docking station allows the Pro 2 to be used like a laptop.

The cheaper model, Surface 2, offers a better screen and other improvements over last year's Surface RT.

Microsoft later announced the US prices. The Surface Pro 2 will start at 899 dollars (£560) and the Surface 2 at 449 dollars (£280).