SMAKN 3-wire 0.28" Mini Dc Volt Meter 0~100v Blue Digital Display Voltmeter Gauge LED Voltage Detector
Cutting size:23.5mm x 10mmMounting holes distance:29mmMeasuring range:DC 0~100V three-wire accessOperating voltage:DC 7.0~30VMeasurement accuracy：1 %(+/- 1 digit)Refresh Rate：about 500mS/timesDisplay:Three 0.28 " LED digital tubeDisplay Color:BLUEOperating Temperature:-10 c ~ +65 cWiring:Red: Power Supply +,(7.0~ 30V DC)White: Measure Voltage +,(0~ 100V DC)Black: Power Supply -, Measure Voltage -