Safety Alarm Door Alarm This door alarm installs in seconds, without any special wiring, on any non-metallic door. It will sound an instant ear piercing 120 decibel alarm if anyone touches your doorknob.The 2-in-1 Alarm is great protection against unwanted visitors. Hangs on your door know and is activated when someone tries to enter. Instant alarm activation for personal use. Great for Travel.Requires one 9 Volt battery.
