Our three button wireless optical wheel mouse was designed to improve your range of motion while eliminating the tangles and hassles of corded mice. Built with 27 MHz radio frequency wireless technology, this innovative design allows you to work longer and play harder. Optical sensing technology scans the desktop at up to 1,500 frames per second, providing one of the most accurate input devices available on the market today. Our built-in scroll wheel allows you to scroll up, down, left, or right with unprecedented speed and accuracy. Automatic wireless synchronization insures plug-n-play functionality right out of the box. Silver top housing with black rubberized accents. USB receiver (dongle). Lifetime limited warranty.