A. Features 1. Sturdy and Durable: These additional door locks are made of strong aluminum alloy, which is not prone to breaking or deforming. When in the protective position, the rubber suction cups can adhere firmly to the ground, capable of resisting forced entry by external forces. 2. Easy to Carry: This door reinforcement lock is lightweight and compact. It can be placed in a bag or pocket and accompany you, serving as your reliable guardian. This two - in - one door safety device comes with an alarm function. Equipped with a sensitive vibration sensor and an 80 - decibel alarm accessory, it can keep you safe and sound an alarm if an intruder attempts to break in. 3. Easy to Use: Whether you are an adult or a child, you can use the door stop with ease. Installation and removal only take a few seconds, and you can install this home security device without tools. In an emergency, you can simply lift it up to remove the lock. B. Precautions 1. Due to different lighting effects, the actual color may vary slightly from the picture. 2. Due to manual measurement, a deviation of 1 - 3 cm is permitted. C. Material Aluminum alloy D. Dimensions As shown in the picture E. Styles 1. Integrated door stop (standard version) 2. Integrated door stop (with alarm version) 3. Single suction cup door stop (standard version) 4. Single suction cup door stop (with alarm version) 5. Double suction cup door stop (standard version) 6. Double suction cup door stop (with alarm version) F. Package List 1 portable alarm door stop