Sell hfjinjing Luxury Doors and Windows Alarm Magnetic Door Alarm Burglar Alarm Home Alarm System Doors best price

Type: door \/ window alarm detecto battery models:AAA (without battery) Main specifications: length 9.1cm wide 3.1cm high 1.9cm Accessories Specifications: Length 5cm wide 1.4cm high 1.5cm Siren loudness: about 90 decibels This product is easy to install, just the main parts were affixed to the door and door frame, or two windows, and alignment (stay about 5 mm gap). When someone opens the door or window illegally (the relative position of the primary and secondary parts changes), the alarm can send a strong alarm to warn the intruder to leave. You have to open the door, the window can be controlled by the switch. Applicable to residential, office, shop counters and other security.