Upgraded Portable Door Stop Alarm with Strong Grip to The Floor, Non-Slip Door Stoppers Security Alarm Lasts 5 Seconds with 80dB, Perfect for Travel & Home Security

What advantages does our alarm for doors when opening have?

1)Protect safety and anti theft

2)Portable to carry when travel

3)Easy to pass through security check when board on planes

4)Superior resistant

5)Installation and disassembly in seconds

6)No drill and harmless installation

Features:

1)Door stop alarm:1 pc

2)Batteries: 3V batteries 4 pcs（2 pcs backup）

3)Size：3.46″L x 1.57″W x 4.72″Th

4)Weight：11.52 ounces

Dual Function: The door stopper alarm can be used as a door alarm and door stopper.Its metal lever and screw ensures a best anti-slip effect to prevent the door moving and alert off intruders.
Loud & Long Alarm: Upon doors vibrate,the door security device can alarm quite loudly with 80dB and last for 5 seconds,which can definitely remind people indoor and scare bad guys away immediately.
Superior Stability: Unlike traditional rubber door stoppers & door alarms, the metal door stop is designed with a vertical structure, which directs the force vertically to the ground. Morever,its adjustable switch for screw tightening and strong resistant rubber foot mat also help to provide a best grip to the floor, making door pushing hard and not slide,ensuring the door stop for bottom of door working well.
Installtion Requirments:(1)The door gap should be 5-35mm;(2)Fits to tiles, wooden floors,marble,cemet floors;(3)Most of hotel doors & doors inside the house can be used(the doors open inward);(4)Situations Not Applicable:1)The buttom of doors are hollow(concave) or raised; 2)Security,iron,aluminium and glass door;3)No door gap;4)Uneven door surface or floor.
Easy to use: Align and insert the door alarm for home security under the door handle, and tighten the bolts clockwise. Very convenient to take with you when travel or stay indoor alone. A really must have around you.