Master Lock Key Lock Box for House Keys – Outdoor Portable Combination Lockbox with Resettable 4 Digit Code, Weather Resistant Durable Metal Body, Holds 5 Keys, 5400D Black

You get this, $25. https://www.amazon.com/Master-Lock-5400D-Combination-Portable/dp/B0002YP1VC/ref=sr_1_1_sspa?s=hpc She controls it with chaster.app, which is free. There's a lot of fun to be had with a Cellmate - I think. The documentation is awful, and the app's so bad I can't even get into it. It is a considerable investment, so I won't get one until I know more about it. Anyway, this is how you do B), cheaper.

A small lockbox to put spare key to your house/garage/car. Mine is hooked onto my water spicket outside. I have used it already, when I stepped outside my sliding glass door, and heard the door lock/stop bar fall over, locking me outside. 😅 Masterlock Outside Key Box