Description: 100% Brand new and high quality This Red DC Voltage Meter with DC4.5-30V range. It is easy to read, install and use And it is self-powered version and supports Reverse polarity protection. When the voltage is under 10V, there will 2 readings after decimal point, which mean the accuracy is 0.01 when it is under 10V; when it is above 10v, the accuracy is 0.1 Mini RedLED display No power supply needed Measure Voltage: DC 4.5-30V two-wire access Display: Three digit 0.56" LED, Red/Blue/Green color Refresh Speed: Approx.300mS/time Highest input:DC 30V (higher than 30v has the risk of burn up) Minimum input:DC 4.5V(below than 4.5V,measurement is inaccurate or does not show) Minimum Resolution:0.01V(10V) Resolution:1%plusmn1digit Working Temperature:-20℃~65℃ Size:Approx. 48mm x 29mm x 22mm(L*W*H) Hole Size: Approx.46*27mm Current Consumption: