DC 0-100V 100A Digital Voltmeter and Ammeter Dual Display With Shunt

From the shop's description

Specifications: Operating voltage:DC 4 ~ 30V Measure voltage: DC 0 ~ 100V Minimum resolution(V): 0.1V Measure current :100A (require external shunt) Minimum resolution(A): 0.1A Operating current: <20mA Display: three 0.28″ LED digital tube Display color: Red and Blue (two-color display) Refresh rate: about 300mS / times Measure accuracy: 1% (± 1 digit) Operating temperature: -10 to 65° c Operating Humidity: 10 to 80% (non-condensing) Working pressure: 80 to 106 kPa Applications:Suitable for automotive/electric cars/motorcycles battery monitoring or other products voltage current measurement Wiring: Black line (thick): vacant or buck circuit (module) negative Red line (thick): power supply+ Black line (thin): COM, common measuring Red line (thin): PW+, measuring terminal voltage input positive Yellow line (thin): IN+, current input+ (Please refer to the wiring diagrams for more details) Diagram: