The Adesso® Tru-Form Media™ 3500 2.4 GHz Wireless Ergonomic Trackball Keyboard is designed with a wireless range up to 30 feet and split key zones with a gently sloped shape optimized for natural positioning of hands, wrist, and forearms for maximum comfort and extended use. The keyboard also features an integrated trackball which can take the place of your mouse, making it easier to control the movement of the cursor. With multi-functional Hotkeys, you get quick access to your media controls, email, Internet browser and other common applications. The Adesso® Tru-Form Media™ 3500 is designed with membrane key switches that provide a quieter, faster response and stand up to long term usage.Built-In Trackball with Universal Scroll FeatureThis keyboard features an integrated trackball, to give you full cursor control and eliminate the need of a mouse. Access the universal scroll feature by pushing down on the trackball and simply moving it up and down for fast web browsing and page navigation.2.4 GHz RF Wireless Technology With 2.4GHz RF wireless technology you can enjoy working at any angle and at distance of up to 30 ft.Ergonomic Design The design of this keyboard with splitted key zones and gently sloped shape encourages natural position of hands, wrists, and forearm in maximum comfort for long use.Integrated Sloped Palm RestDesigned to keep your hands in the natural resting position, this not only relieves joint pain and improves posture, but has also been shown to relieve back pain and spinal discomfort..Quiet Membrane Key SwitchesMembrane key switches provide a better tactile response and a quieter typing experience. Plus they last up to five million keystrokes.Multimedia & Windows Hotkeys Control your media player with just one touch using the built-in Multimedia Hotkeys for easy access to your favorite video or music playlist. Easily complete your tasks swiftly with Windows hotkeys that let you quickly navigate your files and webpages.