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.