One of them activates when a correct combination has been entered, effectively serving as the output for the combo lock. The other two are for activating the clock and affecting a reset if the ...

It’d also make a really neat gift box for that special someone. Maybe use an anniversary date as the combo?

I'm not sure about the ultimate destiny of the video smart lock combo devices. They're flashy and they replace peepholes easily, but they have a lot to prove compared to easy-to-install video ...