Magnetic Door Contact Reed Switch Security Alarm Set for Door Window

1.Anti-fire ABS shield. 2.Suitable to used in apartment, hotel, office, etc. 3.The entry alarm adopts magnetic sensor design to detect any entry from door or windo Suitable to used in apartment, hotel, office, etc. The entry alarm adopts magnetic sensor design to detect any entry from door or window. Easy to install, it will warning you somebody is coming in with loudly and harsh sound. Mounting screws are included here.