Simple and easy to use. From basic multimedia commands to Windows® functions, it will satisfy both your entertainment and work needs. Set up your own commands all with just a few simple steps. Two selectable DPI options of 800 and 1600. 4-way tilting scroll wheel. USB connectivity with magnetic storable receiver. 2.4 GHz wireless technology works up to 30 feet. Uses 2 "AAA" battery (included). 1-year warranty. Medium. Black.