This is the little brother of the GSV-3000 with similar characteristics. 12 to continued (15A max. a 50% duty cycle), adjustable output voltage from 1 to 15 volts. The GSV-3000 offers a selectable voltage or current reading rather than the usual ' black box ' typical for CB radio ... Two sets of output terminals include a pair of binding posts and a cigarette lighters from the car. The unit is built to be insensitive to RF, hash protection, short circuit and reverse polarity.