The AEM X-Series Wideband is the perfect addition to any vehicle that requires precise monitoring of the air to fuel ratio. This gauge features a digital display that provides accurate readings in real-time. The X-Series design allows for easy installation and user-friendly operation, making it the ideal choice for both amateur and professional mechanics. The controller gauge is equipped with a Bosch 4.9LSU wideband sensor to ensure accurate readings across the entire range. Whether you're tuning a high-performance race car or simply want to keep an eye on your vehicle's fuel efficiency, the AEM X-Series Wideband UEGO AFR Sensor Controller Gauge is a must-have automotive accessory.