The Auto Timer allows the vehicle to idle for a preset amount of time after the ignition key has been removed. In turbochargedvehicles this prevents hot oil in the engine from coking up in the lines. Hard driving can raise engine oil temperatureto dangerously high level. Proper cool down is eential for a healthy turbo and engine. In normally aspirated cars, theAuto Timer can also be used to warm/cool the inside of the car without having to sit inside. Features:High useful turbo timer, helps to protect your turbo by cooling down after driving.Greatly improving the combustion efficiency of the engine, save a certain amount of fuel consumption.The voltage, oxygen content (O2) and air fuel ratio (A/F) can be displayed.This turbo timer has the unique feature of RPM monitor to automatically calculate idling times.Automatic countdown feature in order to ensure the most optimum countdown setting from the widest array of vehicles the user can choose from 144 different setings.First timer to utilize O2 sensor voltage when calculating count down time compared to timers that only use vehicle speed and RPM,this timer can set the most accurate after idling time poible.This Turbo Device is equipped with a parking Brake safety function which will keep the car from moving forward when idling in the count down function.Compact size and light weight, convenient and space-saving for installation.Universal fit for all vehicles with a 12 volt switched power source.Specification:Condition: 100% brand newMaterial: plasticShell Color: blackLED Light Color: BlueVoltage: DC 12VBlack Display Case Size: 6.4 * 5.1 * 2.6cm/2.5 * 2.0 * 1.0inBlack Control Unit Case Size: 10 * 1.8 * 1.2cm/3.9 * 0.7 * 0.5inPackage Weight: approx.144g/5.1ozFitment: universal fit for all vehicles with a 12 volt switched power sourcePackage list:1 * Turbo Timer Device1 * Relay Unit3 *Cable Ties2 * Double Sided TapeNotes:1. Please read this manual carefully before installing, profeional installation is highly recommended.2. Please allow 0~1 inch error due to manual measurement, thanks for your understanding.