AEM AEM X-Series OBDII Wideband AFR Controller Gauge provides tuners who are using piggyback tuning modules or open source software with the ability to view AFR through the factory CAN-bus stream that is output by the factory ECU and deliver the most accurate, safe and powerful tune. The 30-0334 X-Series OBDII Wideband Gauge is validated to work with HP Tuners VCM Suite! The X-Series Wideband AFR OBDII Gauge includes an OBDII pass-through connector and Bosch 4.9LSU sensor that can be free-air calibrated or used with the factory resistor calibration. Additional wiring for a 0-5v or RS232 Serial output can be added by the user for outputting to a data logger. This OBDII pass-through capability replaces the traditional AEMnet stream available in the 30-0300 X-Series Wideband AFR Gauge Controller. Patented X-Digital Technology makes it the Fastest Responding Wideband AFR Controller (Patent 9, 575, 030). OBDII pass-through provides AFR readings through the factory ECU CAN-bus – Ideal for users with piggyback programmers or open-source tuning software. Includes Bosch 4.9LSU wideband UEGO sensor and OBDII pass-through connector. Use the factory 02 calibration or free-air calibrate using buttons on the faceplate. Compatible with vehicle/system voltages up to 16V. Optional outputs for 0-5V and RS232 for data logging and feedback control (requires wiring). Can display AFR values in hundredths of percent . 52mm gauge diameter and slim 0.825” gauge depth. Gauge cup depth only 200” deep. Auto-dimming feature. User configurable display via buttons on the gauge face for changing AFR values, Lambda and O2 percent , 3- or 4-digit display and OBDII output settings (if necessary). Black bezel and black dual-faced faceplate included (silver bezel/white gauge option sold separately, PN 30-0300-ACC) Locking connectors.