WB-O2 Nano Wideband O2 ControllerThe WB O2 Nano O2 Conditioner features an extended reading scale down to 0. 35 *, compact size, and CAN communication with our Power FT line of ECUs, preserving your ECUs inputs for other sensors. Sending O2 data to your ECUs datalogger via CAN bus network, instead of traditional analog inputs, is even more useful for builds using an O2 sensor for each cylinder. FuelTechs WB O2 acts as an O2 sensor conditioner and display for Bosch LSU 4. 2 sensors.