Building from our well-known large font backlit keyboards, we've created a Mac compatible version and added an antimicrobial agent (Zeomic, a silver-based inorganic antimicrobial powder) to the exterior parts of the keyboard that exposes any potential contact. This agent prevents growth of harmful bacteria, and protects against the build-up of germs. By sealing the electronic board with an additional internal closure, the KB540 keyboard is also washable - adding another layer of protection against possible contamination.