Voltage monitor 1.Power supply and measuring range are all DC8V to DC30. 2.LED color red ,blue,green,orange 3: ... DC8-30V CE certified 15 years digital meter MFT experiencVoltage monitor, Battery tester, Car voltage meterPerfect design, Ultra-bright displayFor ... plug into the vehicle's cigarette lighter or power receptacle to monitor battery. ( function(){ var aBigImageSrc = [ 'http://i01.i.aliimg.com ...