Adesso 2.4 GHz Wireless Ergonomic Trackball Keyboard

ireless Connectivity - RF - 30 ft - 2.40 GHz - USB Interface - 105 Key Next Track, Previous Track, Refresh, Search, Forward, Wake-up, Play/Pause, Volume Up, My Computer, Mute, Sleep, ... Hot Key(s) - English (US) - QWERTY Layout - Trackball - Membrane Key switch - Black Built-in Trackball Ergonomic Design 20 Multimedia & Windows Hotkeys Features: Wireless TechnologyWorks up to 30 feet of wireless distance. Operates on 12 different channels, each with 65,536 different IDs. Desktop full sizeFull size keyboard provides better typing experience. Ergonomic Contour DesignMinimizes forearm muscles from twisting and pains from Carpal Tunnel Syndrome. Split Key DesignEncourages natural position of hands, wrists and forearms for maximum comfort. Integrated Palm RestKeeps your wrists in the most comfortable position. Built-in Trackball with Optical SensorTracks accurately and precisely with less muscle movement for maximum comfort. Multi-Media HotkeysProvide ease of access to some of th