MSI yesterday introduced two new slim, light laptops designed to take on Apple's MacBook Air. The 14in X-Slim X400 and the 15in X-Slim X600 are set to launch later this year.

The 14in X-Slim X400 weighs only 1.5kg with battery included, the 15in X-Slim X600 2.1kg. Both laptops are less than an inch thick, have 16:9 aspect LED screens and Blu-ray Disc support. The 15in X600 has a separate GPU, but don't expect it to be a gaming machine.

All the MSI X-Slim laptops will run Windows Vista and come with 2GB RAM.

"MSI's latest X-Slim Series is a complete line of products designed to set new industry standards and the introduction of the X-Slim Series will further strengthens our position in the notebook market and helps us reach a new development milestone," said MSI CEO Joseph Hsu.

The two new MSI laptops follow the established 13in MSI X-Slim X340, a slim laptop with an Intel Core 2 Solo ULV Processor that weighs less than 1.3kg with a 4-cell battery.

The smaller X320 and the X340 laptops share the same, slim chassis, ranging in thickness from 6.6mm to 19.8mm. For added battery life MSI's X-Slim range offers an optional 8-cell battery for the X340 and X400, and an optional 9-cell battery for the larger X600.

The X320 has a 250GB hard disk drive, an Intel Atom processor running at 1.6GHz. The X340 has a 320GB hard drive and an Intel Centrino CULV SU3500 1.4GHz processor, as well as an HDMI port.

The MSI X-Slim X320 will start at £659, the X340 £859. An optional extra is the £199 external Blu-ray optical drive.