This is an outstanding invention in home security for the small pocket. Use this DSAL-2 125db door stop alarm to block a door from being opened. If anyone tries to open the door, this alarm will sound. There is also a movement sensor with adjustable sensitivity to activate the alarm if tampered with. An on/off switch allows the alarm to be turned off so that it doesn't go off in your luggage. $ 15 From Sunster
