If you're looking for a computer mouse that can also help navigate slides during presentations and even fit in your pocket, the Logitech Cube Mouse could be for you.
This versatile mouse is easy to use, and has a lithium polymer battery that recharges via USB. Plus, it has a power switch so you can conserve battery power and go longer in between charges. And don't worry -- when it's running low on power, the indicator light will let you know to eliminate any unwelcome surprises.
To get started, simply plug the tiny receiver into an available USB port on your computer. If you choose, you'll be able to connect a maximum of six (total) Logitech Unifying devices to this receiver. You can also download software for swipe-scrolling, similar to that of the touch screen on your smartphone.