PRODIGY® P2 is the most advanced brake control, it requiring no manual leveling. Equipped with a self-adjusting sensing device allows for easy, flexible installation — from nearly horizontal to nearly vertical — PRODIGY® constantly adjusts itself to the position of the tow vehicle. Applies power to the trailer brakes in proportion to vehicle's deceleration. The only inertial control that works proportionally in reverse.Digital display depicts voltage delivery to trailer during braking. Continual diagnostics check for proper connection, shorted magnet condition and much more. Exclusive "boost" feature gives users the ability to apply more initial trailer braking power when towing heavier trailers. Power-saving mode reduces drain on battery when vehicle is not in use. Unique pocket mount allows for flexible mounting, with an easy disconnect feature for removeal and storage when not in use. Made for up to four-axle trailer brake systems. Limited lifetime** warranty.