No level adjustments needed as it self-adjusts to varying terrain as you drive. Designed to work with electric over hydraulic trailer brakes. Produces stops that are in proportion to vehicle’s deceleration rate. Works proportionally in reverse –with the ability to disable when not needed. The “Boost” feature gives the ability to apply more initial trailer braking power as desired. Includes reverse battery protection for both vehicle and breakaway systems. Multiple mounting options –including 360 degree vertical rotation.