2 Mounting Options: This key lock box allows 2 ways of installation. You can mount it on the wall of your home or office. And it comes with a removable lock shackle, you can securely hang this lockbox on a doorknob or fence. Very easy to use. Large Capacity: The key storage lock box has a large internal storage space. You can put your house keys or access cards in it for emergency entry when you go out for business or on vacation. Safe and convenient. High-Security Lockbox: Resettable 4-digit code offers you 10,000 possible combinations. The 4-digit combination is easy to remember and reset, not easy to be cracked and ensures the security of your keys. Sturdy and Durable: The premium aluminum alloy lockbox body prevents the lockbox from being hammered, sawed, or pried open. Wide Application: This key lockbox is rust-proof, corrosion-resistant, and waterproof, suitable for apartment entrances, garages, and rental houses' key storage. Perfect for realtors, cleaners, pet sitters, etc.