Balmar Max Charge MC-618 Multi-Stage Regulator w/ 54in Harness - 12V One Size. Includes wiring harness.Features:Intelligent multi-stage regulation.Digital numeric LED display.Epoxy-encapsulated circuitry.For use with 12 volt systemsWiring harness includedCan be used to drive twin alternator installations.For usewithP-type externally regulated alternatorsDash lamp and auxiliary lamp terminalsSmall engine modeMagnetic programming tool includedLiFePo4 (lithium) programOptional alternator and battery temperature sensors sold separatelyThis product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Specifications for Balmar Max Charge MC-618 Multi-Stage Regulator w/ 54in Harness - 12V: Manufacturer: Balmar Application: Outdoor Color: Black Package Contents: Balmar Max Charge MC-618 Multi-Stage Regulator w/ 54in Harness - 12V Balmar MC-618-H: Max Charge MC-618 Multi-Stage Regulator w/ 54in Harness - 12V One Size