Screen and Keyboard I bought two of these screens because I love the low power consumption and ability to run off my 12v DC in the boat without turning on an inverter. I didn’t know which size I’d like the best and I ended up using the 13.3" for my navigation system and the 15.6" for onboard entertainment. GeChic 1305H 13.3" GeChic 1503H 15.6" Custom RPi HAT RPi HAT prototype board The prototyping style RPi HAT boards are what I used to create a solid connection to the compass, accelerometer, piezo and Real Time Clock.