Door And Window Sensor

Alerts the home alarm system when a door or window is opened; sensors can be placed up to 500 feet (150 m) from main control panel. Ideal for use on windows and doors around the home including garages, cabinets, sheds, attics, side doors, and even freezers; superior to other home security products, this premium white sensor looks great inside your home. No wiring needed, plus sensors mount on either side (requires 2xAAA batteries, not included), provides battery status update with low battery indicator.