GlowShift’s Elite 10 Color Series Narrowband Air/Fuel Gauge offers high performance features that allow you to monitor your fuel mixture, ensuring it is at the proper ratio, which results in reduced emissions and better fuel economy. This air fuel gauge connects directly to your vehicle’s narrowband 02 sensor and displays lean, rich, and optimal levels. This 2 1/16 inch (52mm) air fuel gauge offers some great features such as a peak recall function, programmable high and low warning functions, stepper motor technology, 10 color through dial LED lighting, as well as a self-calibration mode at startup, an illuminated red needle, and a low profile magnified tinted lens. The adjustable high and low warning functions will alert you visually or with an optional audible tone, and the peak recall ability gives you an instant vehicle assessment. The included stepper motor ensures all needle movement is incredibly smooth and all gauge readings are extremely accurate. GlowShift’s 10 color through dial lighting lets you match your stock gauges or add a unique look to your vehicle’s interior, and with the color recall feature you never have to worry about resetting the gauge to your preferred color every time your vehicle is turned on. This narrowband air/fuel ratio will also dim 30% when connected to your factory headlight switch, making it easier to read while driving at night. GlowShift’s Elite 10 Color Series Narrowband Air/Fuel Ratio Gauge is installed by connecting the included wire harness directly to your vehicle’s already installed 0 to 1 volt output narrowband oxygen sensor. All of the included wire harnesses are completely plug and play, and securely snap into the back of the gauge with the featured modular connectors. This air to fuel ratio gauge is powered by 12 volts and allows you to power an additional three Elite 10 gauges with the daisy chain feature.