This is truly a Smart Switch! Not only can you choose between supplying ground or 12 volts to activate a circuit, but you can do it through the use of a long list of vehicles sensors! As long as the sensor is within 0-5 volts DC with a minimum signal difference of 0.5 volt, such as TPS, MAP, MAF, water temperature, oil pressure, boost pressure, etc ... the Smart Switch can be used!
The switch can be calibrated to learn the sensor and it can be programmed to activate at a certain percentage of the sensor