With increasing safety awareness, more and more people will choose to install door-to-door in their home to keep their home safe and better keep their home safe. How to use  door stopper? What are the types of  door stopper? Next, let us answer it for you. 1. How to use the door stopper? To use, just place it vertically on the door. Then stick its level foot into the bottom of the door and get close. The other side has a more chained foot that can be held tightly to the ground with a left-handed helix. After installation, even if someone pushes him at the door, he can’t open the door easily. 2. Types of Door Arrivals 1. Suction cup door stopper There are two types of door arrivals, one is for the inner door and the other is for the outer door. It is a special door stopper for the outer door. The 7mm thick rubber pad and the 11.5cm large diameter suction cup make the suction stronger and firmer, and the safety inspection can be carried out smoothly. Complete (airplane, high-speed rail, subway), etc., the operation is simple, directly behind the door, press the button, the net weight is about 360g. This kind of suction cup door stopper is suitable for smooth floors without door joints, floor tiles, marble, etc., and the effect is the best. 2. Portable door reacher This has five advantages. One is more sturdy, precise high pressure, integrated molding; the second is easy installation, direct positioning, no need to adjust; the third is intimate, equipped with heightening pads, which can improve anti-skid, suitable for 99% of the ground (floor tiles, blankets, wood floors), etc. , the fourth is more portable, with a net weight of 208g and a specification of 10*4m, which is also equivalent to the height of a mobile phone. The fifth is for better use, and the requirement of the door seam is reduced to 1. What is the concept of the thickness of five coins? The thickness of a coin is equal to 2mm, and 1.5 coins or 3 mm can be inserted into the door gap, avoiding the insertion is not deep and easy to be pushed open. After a safety test, unless the bad guy knocks on the door completely, you can avoid 5 strong men knocking on the door. In short, whether this is firm, installation, warmth, portability, and ease of use can be called the ultimate. 3. Alarm door device Low, medium and high sensitivity can be adjusted. Alarm according to the method of tapping. Equivalent to 120 sound shells, anti-slip damping primer, improve ground friction, lightweight and delicate, carry it with you, only the size of a mobile phone, put it in a bag that does not occupy an area, take out the safety belt, get it in one second, use it once, and successfully complete the safety inspection ( Airplane, high-speed rail, subway), no matter where you go, it can give you warm heart maintenance. Batteries must be installed, suitable for various door types, and sliding doors can also be easily used.