RARE EARTH MAGNETS: Features industry leading rare earth magnets that allow for up to a 5/8 inch gap, which makes it perfect for double hung or commercial windows. SIMPLE TO INSTALL: Easy installation by simply pulling the battery Tab to begin the Learning process. It works with most brands of Z-wave and Z-wave plus home security hubs WHITE & BROWN CASES INCLUDED: Both White and Brown plastic casing included to match any décor.