Can be hooked up to your door bell or stand alone. If you are going with the stand alone, just charge the unit with the included cable and mount it where you want to see who is coming up to your property. Use the included screws. If you want it for your door bell, take the 2 screws off your old door bell, exposing 2 wires. If you can’t shut off the power, make sure you don’t cross or touch the wires together. Attach both wires to the new ring door bell. It doesn’t matter which wire goes where. The instructions tell you how to hook the ring whether you have a powered door bell or a digital one. The instructions are very good to install the ring. Hope this helps.

Yes, you can wash the dirt cup, which comes in sections, and the blue filter. Since you get 2 of the filters, you can leave the one that you washed to dry and put the 2nd one in and continue vacuuming.

I believe if you have wifi at that location.

Yes, you will feel and hear it. You really need the sub for a complete experience of Sonos. With the equalizer settings and the sub settings, you'll get that feeling. I'm happy with my playbar and sub.