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 This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.