A:Answer Hi BasketballTony,
You will need a monitor/TV just for initial setup (HDMI or VGA) but you don't really need it connected to a screen after that unless you are making some advanced settings changes or unless you want to monitor the cameras without the app.
You can have anywhere as few as 1 camera or as many as 8, so 2 works just fine. You can access this system on your cell phone through the Swann Security app, but you will need to connect the DVR to the internet via ethernet cable, so keep that in mind. In the app, you will be able to view live video, turn camera lights on/off, turn siren on/off, take videos, and record if you'd like.