Max Charge MC-618 Regulator 12V with Harness Multi-StageThe MC-618-H premium 12-volt multi-stage voltage regulator provides the ultimate in charging safety and control. Includes wiring harness. Features:. Intelligent multi-stage regulation.. Digital numeric LED display.. Epoxy-encapsulated circuitry.. For use with 12 volt systems. Wiring harness included. Can be used to drive twin alternator installations.. For use with P-type externally regulated alternators. Dash lamp and auxiliary lamp terminals. Small engine mode. Magnetic programming tool included. LiFePo4 (lithium) program. Optional alternator and battery temperature sensors sold separately