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. First timer to utilize O2 sensor voltage when calculating count down for time compared to timers that only use vehicle speed and RPM,this timer can set the most accurate after idling for time possible. 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. Specifications: Material:ABS Size:Approx.8x6cm/3.14x2.36inches Color:Black Voltage: for DC 12V Package Includes: 1x Turbo Timer Device 1x Relay Unit 1x User Manual 1x Zip Tie 1x Double Sided Tape note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.