Adesso 2.4 GHz Wireless Ergonomic Trackball Keyboard

Brand: Adesso | Product Line: Tru-Form | Model: WKB-3500UB | Manufacturer: Adesso, Inc | Connectivity Technology: Wireless | Pointing Device Type: Trackball | Programmable Buttons: Back, Calculator, Eject, Email, Forward, Home, Music, Mute, My Computer, Next Track, Play/Pause, Power, Previous Track, Refresh, Search, Sleep, Volume Down, Volume Up, Wake-up | Country of Origin: China | Pointing Device Interface: USB | Keyboard Features: Split Layout | Keyboard Wireless Operating Distance: 30 ft | Keyboard Wireless Technology: RF | Keys Layout: QWERTY | Keyswitch Technology: Membrane | Localization: English | Product Type: Keyboard | Wireless Operating Frequency: 2.40 GHZ | Keyboard Depth: 9.30 inch | Keyboard Height: 1.50 inch | Keyboard Length: 20.50 inch | Keyboard Width: 20.50 inch | Weight: 2 lb | Color Family: Black | Color Category: Black | Environmentally Friendly: Yes | Limited Warranty: 1 Year