On the picture: MXâ„¢ Revolution by Logitech
Look at Logitech info on Wikipedia:
Logitech
Overview
Speed
Accelerate your work style.
- Hyper-fast Scrolling: Fly through long documents with the MicroGearâ„¢ Precision scroll wheel.
- Quick-Flip: Move effortlessly between applications and documents with a flip of the thumb wheel.
- Touch to Search: Enjoy one-click access to your favorite search engine—instantly search your computer, network, and across the Web.
Comfort
The perfect grip.
- Natural Position: Enjoy exceptional comfort with an ergonomic grip and deep-sculpted thumb support.
- Convenient Controls: Do more with the mouse; make less visits to the keyboard.
Precision
Every pixel within reach.
- Advanced Laser Engine: Experience extreme accuracy and flawless tracking on nearly any surface.
- Click-to-Click Scrolling: Increase productivity with click-to-click navigation of lists, slides, and image collections.
Convenience
Simplify.
- Smart Scrolling: Automatically switch between hyper-fast or precision click-to-click scrolling modes to match the task at hand.
- Rechargeable Li-Ion: End battery worries forever. Stay on top of your power supply with a 4-stage battery level indicator.
- Extreme Wireless: Experience bulletproof wireless freedom with robust 2.4 GHz Digital Cordless, plus the extra performance of full-speed USB.