Diamond Kote OBD Anti Rust Device

Diamond Kote Wireless Corrosion Protection Unit (CPU), which is an electronic anti-rust device for vehicle anti rust. It is placed in the OBD port in the vehicle. Translucent blue casing. Dimensions are approximately 4.5 cm x 2.5 cm x 3.0 cm (2" x 1.5" x 1"). What it does: It is marketed by dealerships and companies like Diamond Kote as an electronic cathodic protection module that sends a low-voltage electrical current through the car's body panels to slow down or prevent oxidation and rust. This is a used device. New device sell for $800 to $2000.