Description Dual Function: The bottom with mesh rubber can prevent the door sliding. With alarm switch, it can be used as a door stop alarm or door stopper.3 Level of Sensitivities: There are high, medium and low levels of adjustment, and the pressure sensitivity can be adjusted according to different situations.Compact Size: The door stop alarm is lightweight and compact. You can easy to carry around to go anywhere.Loud Alarm: Alarm volume up to 120 DB. The loud alarm can scare off intruders and alert the homeowner. It can better protect you and your family.Notice: Door stop alarm fits compatible with the inner pull door which the seam space is 0.6 to 1.2 inch. Powered by battery. When the sound fades or disappears, replace the battery.Colour:blackMaterial:rubberSize: 14 x 4.5 x 3.8cmPackage Contents:3 x door stopOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.