Prodigy® P2 Electronic Brake Control, for 1 to 4 Axle Trailers, Proportional Reverse battery protection for both vehicle and breakaway Designed to work with electric over hydraulic brake systems Numerous mounting options - including 360 degree vertical rotation Digital display depicts voltage delivery to trailer during braking No level adjustment necessary - it adjusts itself to varying terrain as you drive Great for backing into tough spots! Works proportionally in reverse with the ability to disable when not needed Produces stops that are in proportion to vehicles 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 allows user to remove and store the control when not in use Electric trailer brake control for up to 4 braking axles Limited lifetime warranty