Reverse battery protection for both vehicle and breakaway Designed to work with electric over hydraulic brake systems Numerous mounting options - including 360o vertical rotation Digital display depicts voltage delivery to trailer during braking No level adjustment necessary - adjusts to varying terrain as you drive Works proportionally in reverse - with the ability to disable when not needed Produces stops that are in proportion to vehicle"s deceleration rate Boost feature gives users the ability to apply more initial trailer braking power when towing heavier trailers Continual diagnostics check for proper connection, shorted magnet conditions and much more Quick and easy disconnect feature alls user to remove and store the control when not in use Electric trailer brake control for up to 4 braking axles Limited lifetime warranty (some conditions apply) Display boxed - complete as shown