VM-1 display with backboard set up to read DC Amps. Backboard isolated 12vdc to 12vdc isolated supply, and 4 wire screw terminal connections. Must use a current shunt such as 100 or 1000 amps = 1mV. See current shunts listed here. Powered from 12vdc (24vdc option at increased cost). Includes panel mounting hardware. Optional smoked lens (bezel). Specify current shunt ratio from drop down box.