| 2 AA Alkaline Batteries required (included) |
| 3 Year Warranty |
| 5 Customisable Buttons - Reassign any button to fit your needs. Quick access to the media, programs, and files you use most often. |
| BlueTrack Technology - Microsoft BlueTrack Technology combines the power of optical with the precision of laser for remarkable tracking on virtually any surface. |
| BlueTrack Technology, which combines the power of optical with the precision of laser for remarkable tracking on virtually any surface. |
| Comfort and durability - Rubber side grips and a contoured shape for either hand. Dust-resistant design allows you to track confidently. |
| Five customisable buttons. Assign any button to fit your needs and gain quick access to the media, programs, and files you use most often. |
| Four customisable buttons. Assign any button to fit your needs and gain quick access to the media, programs, and files you use most often. |
| Magnifier lets you see more; just point and click to enlarge and edit details |
| PC and Mac? compatible |
| Peace of mind with three-year limited warranty |
| Tilt Wheel of easy horizontal and vertical scrolling. |
| Use the tilt wheel to easily and efficiently scroll side to side as well as up and down in spreadsheets, web pages, photos and more |
| Windows 7, Windows Vista, Windows XP (excluding Windows XP 64-bit) |