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. Lifetime warranty.
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