RED LED DC VOLT DIGITAL PANEL METER 3.2v-30V V27D-T1

1.Reverse polarity protection, max power supply can not exceed 30V DC. 2.DC Voltage Meter with 3.2V-30V measurement range. 3. Simple wiring, just two wires 4. The position of the decimal point will move according to measured voltage. When measuring voltage is below 10V, the display will have two decimal places to the right; measuring voltage above 10V, the display will have one decimal place to the right. 5. Mounts in a hole size 25mmTall x 45mm Wide. Meter has a depth of 18mm. Wiring: Version A: With Black and Red Wires Only, Black to Negative and Red to Positive. Voltage being measured also powers the meter and must be between 3-30DC. Meter is only on when voltage is present. Version B: Black, Red and White Wire, Black to Negative and Red to 6-12VDC positive power source powers the meter at all time / always on. White Wire to Positive of Voltage being measured. Voltage measured must be between 3.2-30DC.