Know the state of your vehicle before sending it to the mechanic. See how your Car is performing. This machine allows you to pair your phone to your car to let you know what is causing the check engine on your dashboard. It also allows you to clear the check engine symbol on your dashboard. It's a must-have device if you want to know the health of your cherished vehicle. It comes with a software for your phone. It supports both android and apple, as well as windows laptop with Bluetooth