so the buzzer circuit stays open. When you move the magnet by opening the door, the spring snaps the switch back into the open position. This cuts off the current and closes the relay, sounding the alarm.
The cost of any burglar alarm system depends on the equipment and technology being used but also the layout of the house, the distance of the home to the alarm company and the amount of wiring that is required. It is essential that you understand your burglar alarm system and its features ...
32 zone pstn wireless home burglar security alarm with auto dialer > > 1. Description: 1. 32 zones with 32 different zones indicated on panel. 2. With internal back-up rechargable battery for more than 48 hours3. Each zone can be put more sensors. 4. Partial disarmed optional by remote...
Description Product Name: 99 Zones Wireless Home House Security Alarm Burglar System Auto Dialer Phone Call Easy Install Item Code: 154371693 Category: Alarm systems Add to Favorite Categories Short Description: 99 Wireless Zones; ; Supports 8 types of defense zones; Wireless Frequency:315MHz; stor...