12 inch screens are nice, I went from 9 inch only to a 12inch and 9inch , actually 12 is my main screen, I also run a 9 at the same time.
I have Lowrance hds12 live and lowrance Elite 9
I am not super tech savvy but it has wifi so you can download the app and run off your phone , on what is on the screen.
I had WhoDat towers install all of it, with a radar arch and Lowrance Halo radar. Radar is real nice for the foggy times.