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.  KIT COMES WITH INTERNAL TERMINAL BLOCK NEEDED TO SWITCH OUT FROM AN INTERNAL REGULATOR TO EXTERNAL.  SOLDERING AND ALTERNATOR DISASSEMBLY ARE NEEDING TO BE DONE IN ORDER TO INSTALL