Square Display AC Voltmeter Ammeter Used For Line Measurement Value Display LED Indicator DC Voltmeter Light Signal Simulation Product Parameter: Product Name AC Voltmeter DC Voltmeter AC HZ Meter AC AMP Meter Model Number FXB16-22FSV FXB16-22FSV+ FXB16-22FSH FXB16-22FSA Measuring range 24V~500V AC 4V~100V DC 0~100Hz 0~100A Operating Temperature -25~+65 -25~+65 -25~+65 -25~+65 Opening Diameter 22mm 22mm 22mm 22mm Rated Power 0.5W 0.5W 0.5W 0.5W Relative humidity 98% 98% 98% 98% Display LED digital display LED digital display LED digital display LED digital display Error 5V 0.1~0.5V 1A Color Available Red/Green/Yellow/White/Blue Red/Green/Yellow/White/Blue Red/Yellow/Green Red/Green/Yellow/White/Blue Product Feature: Stable wiring, strong conductivity, bright LED digital tube, low consumption, fast reading, high precision. Package Include: 1pcs* LED Digital Display MeterPS: AC ammeter equipped with transformer Purchase Notice: AC voltmeter , AC ampere meter, AC frequency meter, can only be used to AC 50-60Hz mains supply , can never be used to generator, motor, engine, silicon controlled transformer, frequency converter, square-wave, Inverter output, the sine wave of the correction wave circuit . DC voltmeter can not be used to electromobile, battery. Please be care, there are small errors with the measurements. Note: Due to technical limitations of dual-display voltage and ammeter products, the minimum test current is 2.5A, and the minimum test current for other single-display ammeters and triple-display ammeters is 0.5A. Below 0.5A may lead to insensitivity, please understand.