The gauge can work with both 12V and 24V. When connecting to 24V , some certain gauges will require a resistor on the connection between the power and the gauge. For those certain gauges, we also ship a resistor together with gauges, and there is installation instruction for each gauge in the box.
Room 926, No.11 Lane 225,
Jinxiang Rd.,Pudong District,
Shanghai, China
Hello,may I help you?