Need information on range extenders

I am thinking about purchasing a Ring Alarm system to replace my existing wired alarm system, and I have a question about placement. Since my house is around 5,000 square feet, I'm afraid that I'll need multiple range extenders. I would prefer to locate the Base station in a mechanical closet on one end of the house, but that would definitely add distance between the sensors and base station. My house has strong wifi throughout. Do the range extenders connect to the Base station via wifi or Z-Wave? Thanks!