For added protection around your home, add a pair of Surface Mount Magnetic Contact Switches to almost any security system. The switch is ideal for any normally open location and will send an alert signal to your security system when it is no longer in a normally open state.
Works with nearly all standard, hardwired alarm systems
Designed for use on Normally Open (NO) applications
Use on doors, windows, and sliding doors
UL Listed for security systems
3/4" Operation gap