Reese Towpower 83500 Brakeman Digital Brake Control
This Reese Brakeman digital brake controller is designed for one to four axle trailers. The digital controls takes the guess work out of brake adjustment and gives the driver greater control, accuracy and confidence.  The driver can control the amount and rate of braking from soft to aggressive with the power adjustment thumb wheel.  This controller is completely compatible with anti-lock braking systems.