The alarm door stopper is equipped with an alarm switch, when turned to "on", if there is any pressure on the door, the door stoppers security of 120db loudness will be triggered. Further, if the alarm is switched to "off" status, then the door alarm for home can be used as a common damping rubber base door wedge, to hold your door open at any particular angle. The door stopper is made up of stainless-steel cover, high quality plastic body and damping rubber bottom, making it very durable.