Real-estate lock box

The device holds the keys to a house to allow common access for all real estate agents, while continuing to keep them secure.

[1] Permission is generally required from the seller or the owner, to install such a device on the door.

[2] Lock boxes can also be used for the general storage and security of keys for access by family members or other affiliated groups.

Traditional real estate lock boxes are secured either with a physical key, a security code, or a swipe card,[1] while newer wireless electronic versions may operate in tandem with mobile devices, incorporating logging and remote control or configuration.

This feature allows for maximum security, and is nearly the equivalent to changing the lock every time a customer leaves.