Yeeco 0.56'' DC 3.2-30V Digital Voltmeter Voltage Tester Measuring Gauge Red LED Display Two Wires Volt Meter for Solar Battery Monitor Car Motor Panel Mount Measure voltage: DC 3.2-30V Display: three digits 0.56" LED digital tube Measurement precision:0.01V(3.2-10V); 0.1V (10-30V) If measure 10V below, accurate to 0.01V,display x.xx Does not require additional power supply with reverse polarity protection Suitable for Car Auto Motor Motorcycle golf cart solar battery voltage monitoring