Adesso 2.4 GHz Wireless Ergonomic Trackball Keyboard, Wireless Connectivity, RF, 30 ft, 2.40 GHz

Wireless Technology. Works up to 30 feet of wireless distance. Operates on 12 different channels, each with 65,536 different IDs. Desktop full size. Full size keyboard provides better typing experience. 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. Built-in Trackball with Optical Sensor. Tracks accurately and precisely with less muscle movement for maximum comfort. Multi-Media Hotkeys. Provide ease of access to some of the most used functions. Membrane Switch. 5 Million keystroke lifecycle for a quiet and fast typing experience. Auto Sleep and Power On/Off Switch. Maximizes your battery life up to 6 months. Wireless Receiver. Small and convenient to plug into to your laptop or tablet.