1. Features - Sturdy and Durable: These additional door locks are made of strong aluminum alloy, which is not prone to breakage or deformation. When in the protective position, the rubber suction cups can firmly adhere to the ground, capable of resisting forced entry by external forces. - 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 a 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 once an intruder attempts to break in. - Easy to Use: Whether an adult or a child, one can easily use the door stop. Installation and removal only take a few seconds, and this home security device can be installed without tools. In an emergency, one can simply lift it up to remove the lock. 2. Precautions - Due to different lighting effects, the actual color may vary slightly from the picture. - Due to manual measurement, a deviation of 1 - 3 cm is allowed. 3. Material - Aluminum alloy 4. Dimensions - As shown in the picture 5. Styles - Integrated door stop (standard version) - Integrated door stop (with alarm version) - Single suction cup door stop (standard version) - Single suction cup door stop (with alarm version) - Double suction cup door stop (standard version) - Double suction cup door stop (with alarm version) 6. Package List - 1 portable alarm door stop