Adesso 2.4 GHz Wireless Ergonomic Trackball Keyboard

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.