Jeanette,
I use Gyration's Air Mouse. There are three models and I have two of them: the Air Mouse Elite (normal size, recharges on a cradle) and the Air Mouse Mobile (smaller and lighter, battery-operated, receiver embeds in mouse when not in use).  The first is my every day mouse at home, the second for the road, though I often take them both with me. 

http://www.gyration.com/

I bought mine online, I want to say one of the office supply stores.

~Lisa


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