The door stop alarm is great for hotel rooms and dorm room safety. Simply wedge it under the door as you would any door stop and it will impede the entry of any unwanted intruders. If anyone tries to open the door, this 115dB alarm will sound to wake and alert you immediately.
There is also a movement sensor with adjustable sensitivity that will activate the alarm if it's tampered with. On/off switch is on the back of the alarm and includes a low battery indicator light. Uses one 9-volt battery (not included).