This version can be plugged directly into the OBD2 port so no additional wiring is necessary. FEATURES Configure the lower and upper RPM settings with or without the engine running. Engine only needs to be revved to 50% of max RPM if setting up with engine running, or manually input RPM values using Push Button at rear of Shift Light. Configure day and night brightness of the LED?s Choose from 6 Shift Light Patterns - either linear or converging.