NO CARRY KEYS - You don't need to bring keys anymore You don't have to prepare a branch of keys 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. INSTALLATION FREE - With detachable shackle, hang it anywhere including doorknob, fence, railing, pipe, etc. No installation, no drilling, no extra tools, remove it when not needed. HIGH SECURITY & WATERPROOF - Strong zinc alloy construction gives the key case with code high resistance to hammering, sawing and prying. It is suitable for outdoor and indoor use, will not rust, not afraid of hammer, saw, bang, rain. 4 EASY TO USE - Easy to remember and easy to reset, the 4-digit Password Combination has the ability to create up to 10,000 passwords, so you can set your own combination (Please note that after resetting the password, it will be better is to take a photo to save it, otherwise you won't be able to open it.) . LARGE CAPACITY & - It can hold up to 5 house keys or 3 large keys. The inside size of the key box is approximately: 75mm x 55mm x 28mm, fully meet your daily needs..