GlowShift features a single-wire Narrowband Oxygen Sensor, compatible with your GlowShift Narrowband Air/Fuel Ratio Gauge. This sensor allows you to easily install the Gauge into a vehicle which does not have an existing sensor, by using a single green wire that attaches to your Narrowband's green wire for effective installation and identification. The Narrowband Oxygen Sensor also features a butt connector and heat shrink, resulting in an easy and waterproof connection as well as many years of trouble-free use. Additionally, the Narrowband Oxygen Sensor is an extremely useful and cost-effective replacement for many stock oxygen sensors. GlowShift also includes installation instructions, free lifetime technical support and a one-year limited warranty with each purchase.Narrowband Air/Fuel Ratio Oxygen Sensor is compatible with:7 Color Series Narrowband Air/Fuel Ratio GaugesGS-T702, GS-C702, GS-W702Elite 10 Color Series Narrowband Air/Fuel Ratio GaugesGS-ET02, GS-EWT0210 Color Digital Series Narrowband Air/Fuel Ratio GaugeGS-TCD02Tinted Series Narrowband Air/Fuel Ratio GaugeGS-T02