Features: Heavy Duty: These extra door locks are constructed of robustly alloy aluminum, it's not easy to break and deform, the rubber suction cup will fasten to the ground enough to stand strong to prevent forced entry when it is on the guard position. Portable: This Door reinforcement lock is light and compact, it fits in your bag or pocket, can go-anywhere with you to be your loyal guard. This 2 in 1 door securitys device is with alarm, it will keep you safe and alerted if any intruders attempt to break in because of the sensitive vibration sensor and 80db alarm attachment. Easy To Use:Whether you are an adult or a child, you can use door stopper easily. TAKES ONLY SECONDS to install and remove. No tools are required to implement this home securitys device. In case of emergency, you can easily remove the door lock with an upward motion. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Material: aluminum alloy Size: As picture show Style: One-piece door Stopper standard One-piece door Stopper Alarm Single suction cup door Stopper standard Single suction cup door Stopper alarm Double suction cup door Stopper standard Double suction cup door Stopper alarm Package List: 1x Portable Alarm Door Stopper