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". Warranty on external voltage regulators are 30 days from purchase date.  PLEASE NOTE THAT YOU MAY RECEIVE PN V1200F, V1200 OR V1200P.  THEY ARE ALL SAME, ONLY TERMINAL SIZES CHANGE.  THESE ARE 100% TRANSPO MADE WITH BOX AND STICKERS, NOT THE GENERIC ONES BEING OFFERED ON EBAY