Features: 8 Blue/Green LED display Fuel 1 yellow LED means that the gas is few, and 1 red LED means the petrol is almost running outThis oil meter has a delay function circuit that does not cause flickering of the LED display because the for tank is sloshing during driving. Blue LED can be clearly shown in strong sunlight. Installation：1. Black +12V connect Power Positive 2. Green -12V connect Power Negative 3. Yellow Wire connect Oil can Sensor(must not connect with the original test wire, or this Fuel Gauge is inaccuracy) Important: Green means the display of LED has a red / yellow / 8 green Blue is the indication that the LED has a red / yellow / 8 blue This product must be used with the oil capacity sensor (that is, oil float) Attention: This product only matches with vehicles whose oil is full and resistance is small, or oil is running out, and resistance is large. If your oil float is in opposite situation, please place the order with great caution Specifications: Material: ABS Numbers of LED: 10 leds (8 pcs blue,1 pc yellow,1 pc red) LED Color: Blue/Green Voltage: for DC 12V OHM Range: 0-566 OHM Application for Car and Motor Gauge Diameter: 52mm/2.06" Height: 27mm/1.06" Wire length: 37cm/14.57" Quantity: 1 Pc Package Includes: 1 x Fuel Level Meter Gauge note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!