The Adesso Wireless Ergonomic Keyboard and Mouse offers users two advanced input devices with ergonomic design, multifunctional features and a wireless range of up to 30 feet. The design of this keyboard with split key zones and gently sloped shape encourages natural position of hands, wrists, and forearm in maximum comfort for long use. The included wireless laser optical mouse not only provides a comfortable ergonomic design but also includes a DPI switch for changing resolution from 800 DPI to 1200 DPI and 1600 DPI for better navigation on larger screen styles. Also includes browser forward and back browser buttons for improved navigation. Quiet membrane key switches provide a better tactile response and a quieter typing experience lasting up to five million key strokes.Package Includes: (4) AAA Batteries; Users Manual; Warranty Information