Logitech Advanced Optical Tracking technology
Improved LED light positioning makes this optical mouse more responsive and accurate.
Logitech Advanced 2.4GHz wireless connection
Wirelessly connects to the included Unifying nano-receiver, which plugs in to your computer's USB port and works across an array of Unifying-compatible wireless devices.
5-button design, including the scroll wheel's tilt function
The scroll wheel is ribbed for extra grip and includes a tilt function to go back or forward while surfing the Web.*
Ambidextrous, contoured shape with rubber grips, so this mouse can be used comfortably whether you're right- or left-handed.
* Tilt wheel will not support backward/forward on Apple® computers but will support Dashboard, Exposé or Spaces (when you select in System Preferences).