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

Wireless Technology - Works up to 30 feet of wireless distance. Operates on 12 different channels, each with 65,536 different IDs. Ergonomic Contour Design - Minimizes forearm muscles from twisting and pains from Carpal Tunnel Syndrome Split Key Design - Encourages natural position of hands, wrists and forearms for maximum comfort. Integrated Palm Rest - Keeps your wrists in the most comfortable position. Membrane Switch - 5 Million keystroke lifecycle for a quiet and fast typing experience. Built-in Trackball with Optical Sensor - Tracks accurately and precisely with less muscle movement for maximum comfort. Built-In Scroll Wheel - Provides convenience for office applications or web browsing. Removable Trackball - Allows for easy cleaning. Auto Sleep and Power On/Off Switch - Maximizes your battery life up to 6 months. Compact and Portable - Ultimate space saver and easy-to-carry on the go.