Dual Function:
Can be used as a door stop alarm and door stopper, Its high-damping rubber bearing can prevent the door from sliding and prevent the bad guys into it. A protector around you. Can be used at home and travel. Notice: The door stop alarms fit for the gap between the door and the ground to be 0.6'' and 1.2''.

3 Levels of Sensitivities:
High-Medium-Low Sensitivities, which can be adjusted according to your own needs.

Loud Alarm:
Very loud and shrill which would definitely scare someone away with a 120db alarm. Weight: 4.5 oz.

Powered by 9V Battery:
The door stop alarm is powered by a 9V battery, One piece can be used for a year under normal circumstances. Very practical. (Note: Battery not included).

Easy to Use:
No installation required, Simply place the alarm behind any inner pull door (home, hotel, etc). very convenient to take with you when traveling or staying indoor alone. A really must-have around you.