ITEM NAME:DC 0-100V/50A 2in1 Red Blue Digital Voltmeter Ammeter Volt Amp Meter W/ Shunt 100% brand new and high quality Wperating voltage:DC 4 ~ 30V Measure voltage: DC 0 ~ 100V Minimum resolution(V): 0.1V Measure current :50A (require external shunt) Minimum resolution(A): 0.1A Operating current: