External Buttons

I have an iPaq5450 which I use for timing in various events. Does anyone know of an external button that I can connect by cable/jacket to the iPaq so that it can be used at a distance from the machine itself?

The ideal would be some interface to a standard playstation type controller that would therefore have a number of available buttons

The races typically last for 2 or more hours so battery life is an important issue.

Thanks

[Charlie]

Welcome to our forums.
I've never seen anything like you are looking for. Have you tried searching google for anything like it? I didn't know what to start searching for.