Offroad Ignition, purpose built to handle tough, challenging trail use and race conditions.;MSD’s smoothest rev limiter yet! Easy on your engine; Fully potted design provides reliability even in high vibration and wet circumstances; Large, easy to read LED display; Simple setup of features such as the rev limiter with three rotary dials on the face of the unit; Built-in Start Retard adjustable in 0⁰, 10⁰ or 20⁰ increments for quick, easy starts and extend starter life; LED displays rev limit, highest RMP turned, cylinder select, start retard, battery voltage and can be set to tach mode; Full delivery of spark energy down to 6 volts battery supply; Highly efficient, low current draw for extended battery life; Rugged housing to stand up to demanding offroad and race conditions; Single plug-in connector for clean wiring; Works on 4, 6 and 8 cylinder engines; Reverse polarity and overheat protection provide ultimate reliability;