Tri-Pro Back Sensor TP-BS01 Back Sensor for Trucks I bought this new, but I'm selling it because I got rid of the truck before installing it. I applied silicone to the unit for waterproofing. It has never been installed or powered on. Please check the photos. Since it has been opened and waterproofed, I will consider it a used item. Thank you for your understanding. How about preventing accidents on the upper part of large wings, etc.? Safe and secure for blind spots on trucks. No claims and no returns, please. Thank you.