Peace of mind for home, office, or travel. Hang the Flipo Door Guard Alarm on any style doorknob or deadbolt lock in your home, office, or hotel room. If the door moves, the alarm sounds with an extremely loud 98-decibel siren for 20-30 seconds. If the motion stops, the alarm will automatically reset itself after 5 seconds. The Door Guard Alarm has a sensitivity control that allows you to customize it for just the right amount of movement before the alarm sounds. The Flipo Door Guard Alarm features a convenient built-in emergency LED flashlight. The Door Guard Alarm requires 2 AAA batteries that are not included. The Door Guard Alarm is part of the Flipo Battery Powered Alarm family. Features: Dimensions - 2" x 1.75" x 4" 98dB Alarm Built-In Emergency Flashlight (Alarm does not function while the light mode is engaged.) Variable Sensitivity Settings (High: More sensitive, great for heavier/thicker materials., Low: Less sensitive great for thinner material.)