This thing is just something you need as a driver. I had a normal dashcam until someone bumped the back of my car. After that, my head kept telling me I need a rear view camera and this is amazing.
You can split the screen to show front and back, move the camera screen up and down to make parking easier when reversing and the extra GPS box shows your speed, so it’s your insurance if someone says you were speeding if you get a knock.
Highly recommended. Ignore the price, it’s worth it!