NO CARRYING KEYS - You no longer need to bring keys! You don't need to prepare a key branch for each family member or hide the keys under the doormat. One password for your whole family. Also a perfect solution for storing AirBnB rental keys. Don't worry about locking friends and family out the door INSTALL FREE - With removable shackle, hang them anywhere, including doorknob, fence, railing, pipe, etc. No installation, no drilling, no additional tools , remove it when not needed HIGH SAFETY & WATERPROOF - Strong zinc alloy construction gives the key box with code high resistance to hammering, sawing and prying. It is suitable for outdoor and indoor use, does not rust, is not afraid of hammer, saw, bang, rain EASY TO USE - The 4-digit password combination is easy to remember and easy to reset and offers the ability to assign up to 10,000 passwords, allowing you to set your own combination (Please note that after resetting the password, it is better to take a photo to save it, otherwise you will no longer be able to open it .) LARGE CAPACITY & - It can hold up to 5 house keys or 3 large keys. The inner size of the key box is approximately: 75mm x 55mm x 28mm, fully meet your daily needs.