Description:8 Blue/Green LED display Fuel1 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 tank is sloshing during driving.Blue LED can be clearly shown in strong sunlightItem type: LED Fuel GaugeMaterial: iron platingShell Color: BlackSize: Diameter 52 mm, Depth 28 mmLED Display: Red (1), Yellow (1), Blue (8)Connection Instructions:Black wire connects to the positive supply (+ 12V) supply.Green Wire connect to earth.Yellow wire connects to the sensor. (not included)This Gauge includes a small adjustable resistor to allow you to calibrate it to your Fuel Depth Sender.Notes:This product requires a fuel sensor to supply it with the fuel depth.This product is NOT waterproof.Package Includes:1 x LED Fuel GaugeNotes:1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you 2. Please allow 1-3cm measuring deviation due to manual measurement.