Feature 1High useful turbo timer, helps to protect your turbo by cooling down after driving. 2Greatly improving the combustion efficiency of the engine, save a certain amount of fuel consumption. 3The voltage, oxygen content (O2) and air fuel ratio (A/F) can be displayed. 4Automatic 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. 5First 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 possible. The 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 temperature to dangerously high level. 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: Material: plastic Shell Color: black LED Light Color: Blue Voltage: DC 12V Black Display Case Size: 6.4 * 5.1 * 2.6cm/2.5 * 2.0 * 1.0in Black Control Unit Case Size: 10 * 1.8 * 1.2cm/3.9 * 0.7 * 0.5in Package Weight: approx.144g/5.1oz Fitment: universal fit for all vehicles with a 12 volt switched power source Package List: 1 * Turbo Timer Device 1 * Relay Unit 3 * Cable Ties 2 * Double Sided Tape Note:s: 1. Please read this manual carefully before installing, professional installation is highly recommended. 2. Please allow 0~1 inch error due to manual measurement, thanks for your understanding.