Timer is JUST that.... Turns on the power and shuts off when the time is up. The "interface" is an AC outlet.
You don't really need one, if you are content with using your wrist watch or a metronome and manually turn on and off the enlarger. Some people prefer that way. I don't. Is it worth it? Maybe?
As to analyzer, I do not have one and don't intend to get one for a while partially due to cost.
Is that your question???