Transpo Voltage Control box, V1200. External Voltage Regulator, 20amp. Designed for 1 Alternator and can be mounted under Dash to keep Heatsink cool. 13.0v-16.0v. No POM harness on this unit, this is a "set it and forget it". Included with the voltage control box will be our harness connection.  Note: comes with external voltage regulator and plug harness.  NOTE: you may received PN V1300 which is same as V1200