Features: Easy to operate. Small and compact, 2 types for you to chhose, high accuracy. The product is a voltage, current and power measuring instrument that can work under high voltage. It can only measure and display the voltage, current and power of the circuit under test. The displayed value can be adjusted through an adjustable resistant. It does not have the function of voltage rise and voltage rise or current limiting and current regulation, and has no impact on the actual voltage and current of the circuit under test. There is no shunt resistant in the measuring range. If the current test-terminal is connected to an external shunt, there will be a short circuit. As long as the instrument is connected in series to the load according to the wiring diagram, it can be used normally. Specifications: Material: Plastics Type: 50A/100A Measuring Range: 50A: 6V-120V 1.2V(Voltage), 0.03-50A 1A(Current) 100A: 6V-120V 1.2V(Voltage), 0.03-100A 1A(Current) Note: There is no onboard shunting manganese copper in the 100A range, and the 100A 75mv shunt must be connect externally for normal use. There is no onboard shunting manganese copper in the 50A range, and the 50A 75mv shunt must be connect externally for normal use. Package includes: 1x Voltage Current Meter