8507111 Electric Time Delay Trailer Brake Controller Replace Brakeman IV Digital Brake Control for 1 to 4 Axle Trailers (Timed)[Fitment] ---Brake Control for Trailer Tow,for example: RV, trailer, truck, sightseeing car. _x000D_ [Easy-to-see display] ---LED Digital display screens show the voltage delivery going from the brake controller to the trailer's brakes. Easy to read, easy to observe vehicle conditions in real time.In case of emergencies, make adjustments in time. _x000D_ [Safer and more stable] --- Fits 1 to 4 axle trailers to deliver a signal from your vehicle's brakes to your trailer,both quantity of braking power (result) and rate of the program (sync) can be adjusted to fit your inclination, the street conditions, and kind of trailer,increase the safety of driving. _x000D_ [Quick installation and use] ---Wiring ports are available for vehicle-specific brake controller harnesses and provide a quick connection between the controller and the towing vehicle for quick and easy installation or removal. _x000D_ _x000D_ _x000D_ Due to differences in shooting equipment, displays, and production batches, the product may have slight color differences. This is normal, please refer to the actual product. We have tried our best to restore the true color through professional equipment, but we still recommend that you watch it under natural light for the most accurate visual effect.