White Door Window Contacts Magnetic Switch Sensor

White Door Window Contacts Magnetic Switch Sensor
Switch Type: NO(normal open type), circuit is connected when magnet is near the switch.
The switch is an electrical switch operated by an applied magnetic field.
Designed for use with alarm .
Great for use in family and factory window, door. etc.
With double-sides tape that for install.
package Content :
1 x Magnetic Door Contacts
4 x Screws
Note:Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.