Adesso Tru-Form Media 3150 - 2.4 GHz Wireless Ergo Trackball Keyboard

Wireless Technology, Ergonomic Contour Design, Split Key Design, Integrated Palm Rest, Membrane Switch, Built-in Trackball with Optical Sensor, Built-In Scroll Wheel, Removable Trackball, Auto Sleep and Power On/Off Switch, Nano Receiver, Compact and Portable Compact and Portable - Ultimate space saver and easy-to-carry on the go. Auto Sleep and Power On/Off Switch - Maximizes your battery life up to 6 months. Removable Trackball - Allows for easy cleaning. Built-In Scroll Wheel - Provides convenience for office applications or web browsing. Built-in Trackball with Optical Sensor - Tracks accurately and precisely with less muscle movement for maximum comfort. Membrane Switch - 5 Million keystroke lifecycle for a quiet and fast typing experience. Integrated Palm Rest - Keeps your wrists in the most comfortable position. Split Key Design - Encourages natural position of hands, wrists and forearms for maximum comfort. Ergonomic Contour Design - Minimizes forearm muscles from twisting and pains from Carpal Tunnel Syndrome. 2.4 GHz RF wireless technology - With 2.4 GHz RF wireless technology and 65000 IDs on 12 channels you can enjoy 30 feet of wireless freedom.