The X-Series wideband UEGO AFR sensor controller gauge (PN 30-0300) features a modern, visually striking faceplate and new seven-segment, center display that is 87% larger than the 30-4110 AEM. The gauge includes a 0-5v and RS232 Serial Port output for feedback control and data logging, and an AEMnet (CANbus) output for data logging. X-Digital wideband technology gives these controllers the ability to read and report values that other controllers do not, which can deliver more optimized engine tuning and a safer overall operating condition Faster response time improves wideband feedback control, and can provide a safer, more powerful and accurate tune. When tuning an engine using wideband AFR feedback control on an inertia dyno, dead time affects the data you are looking at because it is reported in a different operating location than when it actually occurred. Condition: New Manufacturer Part Number: 30-4110 Superseded Part Number: 30-4100 Superseded to 30-4110 Interchangeable black and white faceplates included for customizing gauge appearance (digital gauges only) 4.9 LSU wideband sensor and weld-in bung included (PN 30-4110) No free air sensor calibration required - ever Interchangeable black and silver bezels included Interchangeable black and white faceplates included 52mm (2-1/16inch) gauge housing 0-5v analog output (10-20 AFR range only) AFR VALUE RANGE BY FUEL TYPES: Gauge Display/0-5V Output Gasoline values from 10 to 20:1 AFR 0-5V Output E85 values from 6.6 to 13.2:1 AFR 0-5V Output Ethanol values from 6.14 to 12.3:1 AFR 0-5V Output Methanol values from 4.4 to 8.8: AFR Gauge Display/0-5V Output Lambda values from 0.68 to 1.36 Colour: black Material: plastic Package Contents: 1 * Gauge Sensor 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.