The LC1+ kit includes an LC-1 wideband controller with O2 sensor, plus an SSI-4 multi-sensor interface. Used in conjunction with LogWorks, running on a laptop or PC, this setup allows you to record and analyze 5 channels of data. These channels are Air/Fuel Ratio, and any four of the following: RPM, Injector Pulse Width, Throttle Position, Driveshaft/Wheel Speed, or Boost/Vacuum. All channels can be configured for external 0-5V or frequency.