By Bestbuy.com

Adesso - Tru-Form Media 3150 - 2.4 GHz Wireless Ergo Trackball Keyboard - Wireless Connectivity - RF - 30 ft - 2.40 GHz - Black

Adesso Tru-Form Media 3150 - 2.4 GHz Wireless Ergo Trackball Keyboard - Wireless Connectivity - RF - 30 ft - 2.40 GHz - USB 2.0 Interface - 87 Key(s) - 20 Hot Key(s) - On/Off Switch, Connect, Play/Pause, Stop, Previous Track, Next Track, Mute, Volume Up, Volume Down Hot Key(s) - Windows Vista, Windows XP, Windows 10, Windows 8, Windows 7, Windows 2000 - English (US) - Notebook/Tablet - Trackball, Scroll Wheel - PC - Membrane Keyswitch - AAA Battery Size Supported - Black