Description:X-Series Wideband UEGO AFR Sensor Controller Gauge Part Number:30-0300 300300 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 to lean. The unit's 52mm (2-1/16inch) gauge housing fits in most gauge pods and can be remotely mounted virtually anywhere. Perfect AFR monitoring tool for EFI and carbureted applications, and engine dynamometers Does not oscillate AFR reading like narrow band sensors No laptop required for monitoring for sensor included Accurate to 0.1 AFR Reads in AFR or via a switch in back of gauge housing 24 Color-coded LED display lights provide immediate reference to engined's air/fuel ratio (AFR) or ratio Integrated three-digit display reveals AFR or in real time User-programmable 0-5v analog output included for use with data loggers and virtually any engine management system Serial data stream included for output of AFR ( 232) Package list: 1 x Air-fuel ratio meter 1 x Oxygen sensor 2 x Wire harness 1 x Oxygen transfer sensor connector 4 x Heat shrinkable tube with small accessories Colour:As Shown Material:plastic+metal Package Contents: 1Set x Wideband O2 Air Fuel Ratio Gauge Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.