??? ????? ???? Dual Meter Digital Voltmeter?YB4835VA Digital Display AC 500V/50A LED Ampere Meter Voltmeter -Christmas Gift New Year‘s Gift-

Features: Fixed: the transformer is fixed on the instrument.AC voltage, ammeter same screen, double color, double display, highlight large font.Simple connection of instrument:Two-wire system: no additional power supply, red and black wire connected to measure the voltage at the same time to the meter head power supply (no polarity).Current testing requires no additional purchase of transformer, instrument with a high precision transformer.In the watch head l set fine-tuning potentiometer, it can calibrate the voltage and current error by itself. Specification: Measurement accuracy:1% ± 2 digitsDisplay: 0.39 inches LED digital tube display, voltage _ red, current _ green Measurement speed: about 2 times per second Dimensions:70 * 40 * 40 mm Installation Dimensions:68 * 38 mm Power supply line, measuring line length: about 150mm "split" transformer lead length: about 100mm 40/5000 Operating temperature: -10 ~ + 50 ? Working humidity:10 ~ 80% (without condensation) Working pressure:80 ~ 106 kPa Sunlight exposure: no direct exposure Voltage Range:AC 130~500V Resolution:1VCurrent Range:AC 0~50A Resolution:1A Package List: 1*Fixed A/V Meter Note: The wiring sequence of the instrument is: the circuit of the current loop is connected first, the 220V voltage is finally connected, and after the 220V power supply is connected, no parts and circuits behind the instrument can be touched to prevent the danger of electric shock.