The Brakeman Timed Compact Brake Control is designed for single and tandem axle trailers. Made of 100% solid state construction, this item has no moving parts or pendulums, no hydraulic connections and no leveling is required. The compact size allows to mount anywhere inside the passenger compartment. This brake control features a unique “sync” adjustment for towing different trailers, fingertip output controls and a soft touch variable manual control. Mounting bracket, hardware and instructions are included for easy installation. For use on 12 volt negative ground systems only. Reese Towpower brake controls are 100% "solid-state electronic." Models are designed for use with one to four axle systems. These units meet all National Highway Traffic Safety Administration (NHTSA/DOT) regulations regarding tow vehicle/trailer stoplight activation. Their ease of operation and innovative design features make them perfect choices for today's towing vehicles. Time-Based Brake Controls generate an output signal that increases over a period of time (Ramp Cycle). The Time-Based Brake Controls apply braking power at a fixed rate that is NOT proportional to the pressure applied to the brake pedal.