Prop Puzzle 3 Rotary Knobs with Graduate

Introduction about the props:
Turn three knobs to a location,Props will be triggered, 12VEM lock will be opened.
The owner can modify the password.

HOW TO SET or MODIFY THE PASSWORD?
Before powering the props ,the owner turn the 3 knobs to the position you like,
and then press on the red button in the controller don’t release until power the controller,
Password configuration is complete.If the player turn the 3 knobs to right position the owner preset,the EM lock will be opened.

HOW TO RESET FOR NEXT PLAYER?
Later someone triggering props succesfully,EM lock has been opened,
the owner only need to turn 3 konbs to other position,the EM lock will be locked again.

Props Listing:
1xcontroller
3x knobs
1X12V US adapter

HOW TO CONNECT LINES?
1.The controller powered by 12V adapter.
2.The black and red lines from controller connected to 12V EM lock(Positive and negative correspondence).