The Apexi Auto Timer allows the vehicle to idle for a preset amount of time after the ignition key has been removed. In turbocharged vehicles this prevents hot oil in the engine from coking up in the lines. Hard driving can raise engine oil temperatures to dangerously high levels. Proper cool down is essential for a healthy turbo and engine. In normally aspirated cars, the Auto Timer can also be used to warm/cool the inside of the car without having to sit inside. Specification : Brand new in original manufacturer box Automatically determine the necessary amount of after idling time A/F Value, O2 Sensor Voltage, Battery Voltage and Countdown Time display in red LED A Manual Mode allows the user to preset desired idling times from 0 sec.~10 minutes in 16 incrementsFitment: Universal fit for all vehicles with a 12 volt switched power sourcePackage Includes: - One Control Unit - One Relay Unit - English Installation Guide is included. - ATTENTION: Package does not included Zip Tie, Double Sided Tape, Fitting, Splice, Electro Tap, Serial number