Kensington HID Laser: Advanced laser tracking works precisely on almost any surface with 20X the surface sensitivity as optical
2.4Ghz wireless technology helps ensure high-speed wireless performance and great range--Up to 30 feet
Advanced power management technology provides up to 1 year of battery life on 2 AA batteries
4-way tilt-scroll wheel lets you move side-to-side or up and down easily
Flexible rubber grips provide excellent comfort and control
Mini USB wireless receiver keeps your desk free of clutter
Miniature USB wireless receiver.