How to assign a lockbox to a property:
https://www.sentrilock.com/how-to-assign-a-lockbox-to-a-property/
Release Shackle:
https://www.sentrilock.com/sentriguard-lockbox-how-to-use-bluetooth-to-release-the-lockbox-shackle/
How to open a lockbox:
https://www.sentrilock.com/how-to-open-a-lockbox/#touch-n-show