The Microsoft Bluetooth Mobile Keyboard 6000 is an ultra-portable keyboard with an ergonomic design that might fit in most of our computing style. It is one of the lightest and thinnest keyboard were numeric pad was separated from its alphanumeric pads. The first time I saw this in a Tech site, I am quite impress with its design, from its slender body and its netbook like keys. Try to see this photo below:

It is thin enough but powered by AAA batteries were measures 6.54-inches (numeric pad not included) wide and the numeric pad measures 4.02-inches only and totally unique from other travel keyboards because of its design and build. According to Tech reports, this keyboard is totally rigid compare to others.