Back-up Camera Recommendations?

Bought a complete system on amazon for $50. I mounted the camera on the rear ladder, powered it off a running light, ran shielded cable to the front of the trailer underneath and mounted the transmitter behind the fibreglass nose, also using power from a running light. That way the transmitter on the trailer is as close to the receiver in the truck as possible. It means I have to drive with the parking lights turned on, no big deal. I have the screen fastened to my rear view mirror. Works well.

https://www.amazon.com/gp/product/B01893F3BU/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1