Radtech BT500 tiny bluetooth mouse

I try to use the touchpad on my notebook computer as little as possible. It's uncomfortable and harder to control than a mouse. When I travel, I always bring along my Radtech BT500 bluetooth mouse. It's optical and works well on most surfaces. Battery life seems to be a few full days of use. At $45, it's not cheap, but it's save me ten times that amount in increased productivity and decreased frustration.
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