Innovate Motorsports 3797 LC-1 Plus Kit includes LC-1, O2 Sensor, SSI-4 and Bung/Plug kit This kit allows you to log your vehicles Air/Fuel ratio, RPM, and other 0-5 volt sensors directly to your laptop You will view the data using our award winning logging software LogWorks 3 Take a RPM signal from your vehicles coil, ECU, or ignition system Save extra cash with bundles