1.【Double-Walled Construction】Uncastable and impact-resistant access cover is waterproof for hammering, sawing or prying eyes.Confidently place the keys to your kingdom in our guaranteed key safe 2.【4-Digit Password】The 4-digit password lock box key is more secure.The hinged housing allows for “one-handed” operation.The instructions will guide you to reprogram your passcode at any time.Please note that once the password is reset, it is best to take a photo to save it, otherwise you will not be able to open it.Also there is a U wire in a cabinet key used to unlock them 3.【Rust-Resistant Steel Exterior】Dimensions:12 x 8.3 x 3.5 cm.It is suitable for outdoor and indoor use.Your keys are features a weather-resistant cover, a sliding shutter to protect the combination dials from further damage 4.【Large and Secure Storage】Suitable for up to 5 house keys or 3 large keys. Avoid lock outs and provide healthy access to your property aids, service technicians and pet statuette when you are at workor on vacation. Ideal solution for storing keys for Airbnb rentals. 5.【Installation】Install the key securely with its detachable hook.Installation method on the wall: ①point of the inner open area there will be 4 holes in the bottom of the box.②hold the box to the wall and mark the position of the holes with a pencil.③using a drill with masonry to drill holes in a wall.④Place plastic ramp plugs into the wall.⑤place box against the wall then screw in the screws provided