No level adjustment necessary - it adjusts itself to varying terrain as you drive. Works proportionally in reverse. Digital display depicts voltage delivery to trailer during braking. Continual diagnostics check for proper connection and shorted magnet. "Boost" feature gives the ability to apply more initial trailer braking power. Pre-assembled wire harness for simple hookup. Unique pocket mount. Made for up to four-axle trailer brake systems.

　　Multiple Mounting Options - Including 360 degree vertical rotation.

　　Designed to work with Electric over Hydraulic Brake Systems. everything included to mount and plug in. if ad still here, I still have it..

　　Base Price: $124.95 ..... Have this for '94 to 2013 ford pick up,(except 05-13 super duty). works great, no longer have trailer. 80.00, text only