Features : - Truly plug and play, USB port - Compatible with Windows 2000 / XP / VISTA / Win7 / Win8 - Operating Voltage : 5V - Streamlined and human engineering design, elegant and beautiful - Moderate Key-distance of the keystroke, good elasticity, comfortable touching - Medium and silent design, elegant shape - Protect your keyboard, no need to worry about the accidental spill of liquid, the drainage holes on the bottom can discharge the liquid out of the keyboard smoothly