[ChrisBennet]

I positively love my Logitech cordless, laser, USB mouse. I forget the model number but it looks exactly like the one pictured. I use a laptop and the USB dongle is so small I can leave it in the laptop when I put it in my bag. I need to replace the batteries about once a year (and I use my computer all day and some of the night 7 days a week). Range is "only" about 30 FEET but I can't see the screen that far away anyway. ;-)

I liked it so much I bought a bunch of them for Xmas gifts for my software developer friends, around $70 each I think.
It works on any surface except a glass table and the scrolling wheel is freewheeling so you can just "spin" down a long page.

-Chris