PRODUCT SPECIFICATIONS: 1,600 psi maximum pressure output for axles equipped with disc brakes (K71-651-00) Dimensions: 11.38" long x 6" wide x 7" high Requires a four wire hookup and minimum 10 amp/hour break-away kit Uses DOT 3 or 4 brake fluid, holds 40 cubic inches (0.7 quarts) of fluid Meets all DOT regulations and complies with CFR-393 federal braking requirements Eliminates the feeling of being "pushed" by the trailer (reducing the potential of jackknife) Eliminates the problems found when backing a trailer uphill with surge brakes Eliminates brake drag common with surge brakes on a downhill grade