Microsoft has announced what it says is its thinnest keyboard ever, the Bluetooth Mobile Keyboard 6000, made for Bluetooth-equipped laptops and PCs.

Those skinny dimensions are said to be just a few millimetres thicker than a AAA battery at the back while the design is Microsoft's "Comfort Curve" layout, that claims to encourage "natural wrist posture".

The keyboard features a seperate, portable Bluetooth number pad that can be used with the keyboard or by itself and comes complete with a carrying case.

The Bluetooth Mobile Keyboard 6000 and Bluetooth Number Pad will be available in October 2009 for estimated prices of $89.95 and $44.95.