They have nothing to do with the screen, it only uses a buzzer in the trunk. The unit hooks up to the drivers reverse light, but you have to purchase the unit for a 2016 Honda Accord. It comes with no instructions or tools but at college hills Honda under 2016 electrical parts for accord 2016 look up the sensors and at the bottom of the page are installation instructions, good luck finding the 24 & 26 mm hole saws. I purchase mine from China from gearbest online. You also have to cut a hole through the trunk to get the sensor wiring harness out , the harness comes with a body grommet already attached. I also had to modify the sensor harness plugs to the reverse light but did not damage the original plugs to the light.