The APEXi Auto Timer allows the vehicle to idle for a preset amount of time after the ignition key has been removed. This prevents hot engine oil from solidifying or hardening in the lines or center section of a turbo. Proper cool down is essential for a healthy engine and prolonged turbo life. The APEXi Auto Timer stands as a technological marvel. The pen shaped, compact size makes the Auto Timer one of the smallest turbo timers on the market. This allows a clean and stylish installation virtually anywhere inside the car. The unique multi angle joystick button provides easy navigation through the many feature menus. Upgraded in every way from the previous model, the new APEXi Auto Timer can automatically determine the necessary amount of idle time. A "Manual Mode" allows the user to preset desired idling times from 0 seconds - 10 minutes in 16 increments. The Auto Timer can also display critical data such as air fuel ratio, O2 sensor voltage and battery voltage. Includes user manual and installation instructions for an easy install. A great item that truly works! 100% genuine A'PEXi product. Part# 405-A021. Made by A'PEXi Japan.