Designed for comfort on your laps or on the desk, great for productivity and entertainment alike. While built-in mouse functions are useful off the desktop and for gaming. A futuristic keyboard, a realistic price. USB Connection Features Uses infrared transmission Built-in trackball Specification Input power: 4.5Vdc (three AA batteries) Switch activation mechanism: Membrane Effective operating distance: 5 meters (16 ft) Effective operating angle: ± 5 (horizontal), +60/-30 (vertical) Keyboard dimension: 410(L) x 190(W) x 35(H) mm Keyboard weight: 700g (without batteries)
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