Yeeco Digital Multimeter DC 6.5-100V 50A Voltmeter Ammeter Amperage Voltage Power Energy Meter DC Volt Amp Current Watt Meter Gauge Power Monitor LCD Digital Display with 50A/75mV Shunt This module is suitable for indoor, please do not use outdoor Store energy data when power off, button available for controlling One blue LCD display can show the voltage, current, power and the energy Voltage test range: DC 6.5-100V; Display: 6.50-99.99V ;Maximum current reaches to 100A; With 50A shunt Applied load should not exceed the rated voltage and current. Wiring order can not be wrong