One electroni key for the front then i master front key a back entrance key and two for the Door to my pad..
I have 3 different keys and one remote. The first key for the main door of the appartment building, the second one for the front door of the appartment and the third one for the storage room in the basement. The remote has two buttons - one opens the garage door of the underground garage, and the other one opens the barrier of the car park in front of the building.
i have no idea. i don't own the house. there are four adult males who live here. three of military veterans. there is usually at least one of us home. i know each of us have at least one.