Step 1: Default PIN 0000.

Step 2: Switch the toggle from A to B.

Step 3: Turn the numbers to the new PIN.

Step 4: Switch the toggle from B back to A.

Installing:

Once the lockbox is open, retract the black leaver on the inside. It is located on the interior roof of the box. This will unlock the top lock, securing the key safely onto the property, gas meter, tap, etc.