1.SAFE AND DURABLE: This key lock box with 4-digit code that allows you to set your own combo code with 10000 unique choices, which ensure security and your keys safe. It is tightly sealed and waterproof, durable enough for house key and outside key storage;2.EASY TO INSTALL AND USE: There are 2 mounting options for this combination lockbox for keys. You can mount it on the wall with supplied plugs and screws; besides, you can hang it anywhere easily including doorknob, metal fence, railing, and pipe, no tools needed;3.LARGE CAPACITY: The portable key security gym locker box provides large internal space for holding up to 5 house keys [shorter than 3.35 inches]; When you're traveling or out for business, you can put your house keys, car keys or access cards in;4.WIDELY RANGE OF APPLICATION: By using this 4-digit key lock box that allows you or others access the key at any time, which perfectly suitable for daily activities, friends, relatives, home services, emergency entry, pet sitters and real estate business etc;