Door Stop Alarm, Door Stopper with 120DB Security Alarm Home Expert Door Stoppers Safety Tools Great for Traveling, Hotel, Apartment and Home (Pack of 1, Black)

Features 【3 Levels of Sensitivity】Rubber door stopper with 120 DB High-Medium-Low Sensitivities.

Slight movements can be captured in time, reminding people in the house, and driving away suspicious persons.

】【Simple Use】Simply install the battery, put the apartment security door jam under the door, then you can use it for safety reminder.

It wouldn't slide when the door opens.

The gap bewteen the bottom of the door and the floor should be 10mm(0.38 in) to 35mm(1.35 in)】【Dual Function】This security door stopper can be used with or without battery, you can use the floor wedge door stop to stop the door from opening at the same time.