Voltmeter Ammeter with DC 0-100V 50A shunt PARAMETER --- DC 0V-100V voltage measurement; current 0-50A. APPLICATIONS --- monitoring accumulators, solar panels, model railways, campers, motorcycles, domestic batteries, engines, etc. DISPLAY --- Sharp and bright 0.28 inch LED screen displays voltage (red) and current (blue) value. NOTE --- the shunt must be connected when wiring, otherwise the meter will burn out.  Product parameters: Working current: <20mA Measurement voltage: DC 0~100V Current: 50A Minimum resolution (V): 0.1V Minimum resolution (A): 0.01A Display: 0.56" LED Current Test Range: 0-10A, 0-50A, 0-100A (with 3 ranges) Display colour: red+blue Dimensions: 48 x 29 x 21mm Refresh Rate: Approximately 500 milliseconds/hour Measurement accuracy: 1% (±1 digit) Working temperature: -10-65℃ Humidity: 10% to 80% (non-condensing) Operating pressure: 80 to 106 kPa Wiring: Black wire (thin): negative pole of the no-load or step-down circuit (module) Red wire (thin): power+ Black line (thick): COM, common measure Red wire (thick) Measurement input current (+) Yellow wire (thin): measure the input voltage (+)