Door and window sensors come in two pieces. One fits onto the door or window itself, while its counterpart attaches to the frame. Adhesive usually keeps the sensors in place, though sensors can be screwed directly into the frame. Position the two pieces of the sensor right next to each other, because they interact. When the two pieces are separated, such as when the door or window is opened, they send a signal to the alarm panel.
1.easy to install
2 .Auto-test the bateery power capacity
3.can work with other alarm system
4.This is separated wireless door sensors, magnetic control and
5.wireless transmit are separatad .
6.It can be installated in doors ,windows and other special places.
7.Low power report to alarm host
8. Low voltage is prompted on sight
9. Automatic temperature compensation
10. Emission Distance：≥200m(in the open area)
11. Emission Frequency：433.92 MHz
13. Working Power：DC 3V（ battery No.7 1.5V/AAA 2pcs）