The Door/Window Sensor is designed to monitor any door or window within your house. When the monitored window or door is opened, the receiver will alert you. It will beep and flash.
Comes with a sensor, a magnetic switch, 3V lithium battery, a clip, mounting plate and screws.
Magnetic type contact sensor.
Notifies you when your door or window is open.
Supervised Sensor: monitors the sensors and their battery condition automatically.