FEATURESSecurity Protection for Home and HotelOur door stopper is a portable, industrial strength door security device that prevents unwanted entry, It can provide protection when you are at home or when traveling in hotels.Upgrade DesignThe door stop adopts the third-generation mechanical design, it just takes moments to fit to any standard internal door, simply place it under your door and turn the screw, once fitted, it uses displacement of force to barricade the door against an attempt at forced entry. And easy to install and remove.The Hardest MaterialAfter years of research, we have produced this product. Small but very hard material. Don't worry about your safety, it can firmly hold the door.In case of emergency, you can easily remove the door brace with an upward motion.Easy To UseWhether you are an adult or a child,you can use it easily. Position the door blocker with the bottom flange under the door, directly below the door handle.adjust the foot so the door stopper is tightly fitted. Test the door, to make sure the door stopper is securely positioned.ALARM PARAMETERS Two CR2032 batteries 80 dB Indicator light flashes every 6 seconds Battery standby time 3 months Starts working after flashing Used normally 60 times 5 seconds each time HOW TO USE 1. Insert the door handle below 2. Tighten the bolt clockwise 3. Turn on the alarm switch 4. Open the door from the inside and try SPECIFICATIONS Material: Zinc alloy Color: Red Product features: portable, durable Applicable door thickness: 5-35mm Product weight: 233g Size: As shown PACKAGEPortable Door Stopper * 1 PC