The Super Door Stop Alarm sounds a 125db alarm when pressure is applied to the foot pedal like device. Meaning the door would have to open onto it. On the converse, when the alarm is not turned on (total guess) it can act as a ‘door jam’.
Available here for $15.
Grew up back East, got sick of the cold and headed West. Since I was small I have been pushing buttons - both electronic and human. With an insatiable need for tech I thought "why not start a blog focusing on technology, and use my dislikes and likes to post on gadgets."