Casio has two new simple-yet-useful products that come to rescue. The Casio MZ-120WL and Casio JZ-120WL look like normal calculators, except they come with USB dongles to enable them to be used as number keypads over wireless connection. Effective range is around 1m, and they can be used as cursor keys to control the flow of your presentation too. [via] Link.
TOOLBOX: Casio Wireless USB Solar Calculator