The alarm comes with multiple sensors and remotes. This should be enough for a small to medium sized home. It was fine for my garage. Sensors work pretty far, and same with remote. Remote is very convenient, it's as some as opening or closing your car. I never really use the keypad.
I with the instructions to setup wifi was alot more simllier, I haven't set it up yet but will do it soon and update my review.
So far it does exactly what it says it does. So I'm happy!