Generation II wideband air/fuel system to be used with data logging systems such as a dyno or the Mobile Dyno feature from TechnoResearch. Includes controller, Bosch LSU 4.2 sensor and sensor bung. Includes two Bosch LSU 4.2 O2 sensors with the Direct Link tuner are required with this box. Interfaces directly with any TechnoResearch VCM-TR3 communication interface box. Compatible with tuners such as Tune Builder, Centurion Pro, Centurion Pro Plus. Provides high-speed and full digital precision. 12VDC power input required. Made in the U.S.A.