Anti-theft alarm suitable for multiple occasions: Single apartment/ Rental/ Travel/ Home/ Company and other occasions that needed the anti-theft and financial loss prevention.

1) This product is suitable for a 9V Battery

2) Door gap alarm: plug the product into the door gap Attention: If the gap between the bottom of the door and the floor is less than 0.5 cm or more than 3.5 cm after opening the door; Or the floor is made of marble and other very smooth materials, this product will not work properly, please pay attention!

3) Three adjustable sensitivity levels of this product: H is high sensitivity (vibration alarm); M is medium sensitivity; L is low sensitivity The sensitivity can be adjusted according to the daily situation. When someone pushes the door open, it will emit a 120DB harsh alarm sound to remind you and neighbors that there are thieves trying to invade the room, so that it prevent thieves or criminals from entering your house.