Hey guys first post here.

I recently came into possession of a 95 Ef Fairmont.

It came with what looks like a older after market alarm system.

It comes with a Key that is inserted behind the alarm system unit.
Behind the unit looks like what had the model number of the unit but weather has rendered it un readable.

What I would like help is identifying what model/brand it is and what each of 3 settings on the back actually mean.

Because there isnt really much else to say I have included some pictures which should help someone help me