DIGOO DG-HOSA 433MHz Burglar Alarm Sensor, Wireless Windows Doors Sensor and Infrared PIR Motion Detector, Work with Any 433MHz Home Security Alarm System for Home and Business(2 Pack)

DG-HOSA Wireless Guarding Windows Doors Sensor
The way to work:Fix the windowdoor sensor to the door,the door stripe to the doorside,and ensure when the door or window are closed,it can lean together. If the doors or windows are opened,the door stripe and door sensor are one after the other,the door sensor will send the singal to the alarm system,will automatic alarm.
Different from the general item available on the market,the Infrared PIR Detector and the WindowDoors Sensor both are the use of 3M double-sided adhesive,make stronger the viscosity to prevent to fall off easily.
DoorWindow Alarm Sensor*2:Pair of magnetic sensor,ultra thin and sensitive,trigger an alarm once the “gate”open.Suitable for place at doors,windows,drawers or your personal box.Effectively and real-time protection for your home property sercurity and circle of relatives safety.
Newest PIR Sensor*2:Adopt original red-dot PIR sensor,120°wide detection angel and up to 12m detection distance,high senstive and anti HF interference,with temperature compensation,no error shall be issued,effectively keep away from false alarm. Easy instation,recommend the installtion height is 1.8m-2.2m.
Tips:Working Voltage(2x AAA Battery)(Already includes for your convenient the use of),and if those accessories without battery,it’ll flash with red light.