Ultra Slim Multi-Media Standard keyboards Description Mechanical Function: Switch travel: 3.0+ / -0.3mm Keystroke life: 10million times Key switch elasticity: 55+ / -7g Power Requirement: Working voltage: 5.0+ / -0.25Vdc Working current: Less than 30mA Power: Less than 0.5 wt Environment and Temperature: Working temperature: 0 -50 Working humidity: None Condensation at 20% ~ 90% humidity Specification: Product dimension: L465mm* W190mm* H21mm Key layout: 103/ 104/ 105/ 107 keys are available , 16hotkeys Product net weight: Products Compatibility: Support Windows 98 / 2000/ ME/ NT/ XP / VISTA system Support all languages versions, compatible IBM PC/ PS2/ AT/ USB/ U+ P Packing: Color box size: 480* 215* 28mm Carton size: L500mm* W300mm* H450mm Packing method: Color box, 20PCS/ CTN. Two layers