DescriptionWorking voltage: DC 12Vconnect cable:Black: + 12V positiveGreen: -12V negativeYellow: sensor singnal inputLED display :one Red ,one Yellow ,eight blueDimensions: 48x28x19mm(LxWxH)Cutting Size: 46×26mmthis meter have adjustable potentiometer , it can't the same time use with original car oil scaleFill Up the Tank, adjust the potentiometer until the led meter all bright , and until don't have any oil in tank adjust the meter led all crush out .Red light is power supply Indicator light ,the yellow Turn off mean no oil , 5-6 is bright together the other one by one brightMust cooperate with oil sensor (float).Cannot be used together with the original oil scale.Package include :1pcs 12V Unversal Motorcycle Car Oil scale meter LED Oil Fuel level Gauge Indicator