The OBD car interface connects directly to the universal diagnostic socket of all latest generation cars. From the cable on the back of the product you will have the following signals to be used in most of the aftermarket accessories as well as our gear indicators (GT3000 and GT400) and our shiftlight indicator LT2000. + 12V Under key (only fixed power supply is present in the OBD socket, OBD100 switches on the connected device upon receipt of the engine rpm signal) GND Ground RPM Engine revs signal SPEED Speed signal ALARM Low active temperature alarm signal that can be set via the trimmer on the back of the interface Cod. OBD100 OBD car interface
