Features 1. The lock is a portable door lock that installs and remove in seconds without any tools required. 2. The innovative system of hinges and angles anchor the firmly to floors when outside pressure is exerted on the door. 3. The lock is a unique, new and innovative portable door security device for anyone needing privacy and security. 4. Give you additional safety, security, and privacy. 5. The adjustable foot, situated at the end of the hinged leg, allows the lock to be installed on any type of floor: flat or inclined. 6. This revolutionary security device installs in seconds, creating a vertical force against outside pressure for peace of mind at home, the office and in hotel rooms. 7. A great and useful gift for any occasion. Specifications Color:Red Size:Shown as the picture Fit Door Thickness: 8-50mm Material:Alloy For Door Open Direction: Inward Brand: NAIERDI Applicable scene You can use it when you are at home alone; or you can use it when you are traveling and living in a hotel. It can gives you additional safety, security and privacy. Portable size, light weight, but with strong strength to lock the door. The is a portable door lock that can be easily to carry. It can pass the security check, you can take it with you when you travel. Made of high-strength alloy, No rusty, Anti-corrosion, durable, water-proof. With a high decibels alarm Sound at the touch of a button, high-sensitivity induction Let the bad guys escape, and remind the people in the room and related security personnel Physical mechanics structure Even push hard will not move, safe to defend. Giving you additional safety, security and privacy behind it. Conditions of use 1. The direction of opening the door is toward the room 2. The height of the door seam is about 8mm 3. The total height of the door seam does not exceed 50mm Most hotel doors can be used Easy to install 1. put the doorstop directly under the doorlock, insert into the door seam. 2. turn right the bottom to lock. 3. turn on the alarm switch 4. finish Please note: It needs to be installed under the door handle