AjaxDoorProtect Wireless Magnetic Door Detector - WhiteDP.Y.J

White wireless magnetic door and window detector that detects with a reed contact. It raises an alarm when the door or window opens and the magnet moves away; it has an NC input for connecting a wired detector, while shock and tilt detection is found on the DoorProtect Plus model. It offers a radio range of up to 1,200 m and up to 7 years of battery life.