The AEM X-Series In-Line Wideband UEGO Air/Fuel Ratio Sensor Controllers have patent pending X-digital technology that makes them the fastest responding wideband air/fuel ratio controller in independent testing against 17 other wideband UEGO controllers. It is ideal for users who do not need a gauge display and want the fastest response time when data logging or for feedback control when tuning with an engine management system.Patented technology makes this the fastest responding AFR controllerIncludes a highly accurate Bosch 4.9LSU sensor0-5V and RS232 outputs for data logging and feedback controlThe controller comes with a 0-5v and RS232 seriel port output for feed back and data logging and an AEMnet output for data logging. AEMnet allows additional X Series wideband controllers to be daisy chained together for recording air/fuel ratios in multiple cylinders.The system supports vehicle/system voltages up to 16V, and can be used on electronic fuel injection or carbureted applications