Fangrui Product Details X-series Afr Gauge, A Wideband Uego Sensor Controller Accurately Monitors Air/fuel Ratios (afr) During The Tuning Process To Prevent A Lean Fuel Mixture, Which Could Lead To Engine Damage. It Has Combined Its Single-channel Wideband Uego Controller And Gauge Display Into One Unit, Uniting Unsurpassed Afr Accuracy And Control With An Easy-to-read Interface. The Gauge-type Wideband Uego Controller Features A Digital Led Display And Sweeping Led Needle That Changes Colors As Afr Changes From Rich To Lean. The Units 52mm (2-1/16inch) Gauge Housing Fits In Most Gauge Pods And Can Be Remotely Mounted Virtually Anywhere. High Temperature Resistance (-30to 120 Super Toughness. 2.5 Ultra-thin Thickness. Sensor Type:magnetic Induction Part Number:30-0300 0258017025 Name: O2 Air Fuel Ratio Gauge Kit Applications:for , For , For , For , For , For , Etc Note: Installation Guide Not Included, We Strongly Recommend You Professional Installation. Please Check As Much As Possible To Make Sure The Item Is What You N