Mini Slim Multi-Media keyboards Description Mechanical Function: Switch travel: 2.4+ / -0.2mm 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: 0-50degrees Working humidity: None Condensation under 20% ~ 90% humidity Specification: Product dimension: L300mm* W150mm* H13mm Key layout: 88 / 89keys are available , 7hotkeys Product net weight: 372g Products Compatibility: Support Windows 98 / 2000/ ME/ NT/ XP/ VISTA/ WIN 7 system Support all languages versions, compatible IBM PC/ PS2/ AT/ USB/ U+ P Packing: Color box size: 314* 170* 28mm Carton size: L445mm* W330mm* H195mm Packing method: Color box, 20PCS/ CTN. Two layers