By using the OBD interface of the car to connect with the computer(OBD interface cannot be directly connected to the computer), you can view the car data in real time and detect the car problem. Total Length: 43cm / 16.93'' This is a brand new data link cable, used specifically for connecting your OBD2 scanner. Attention: this item is just an adapter, not a scanner. Durable and waterproof, convenient to use, plug and play. The cable adapter is made of plastic and metal, corrosion resistant, heat resistant and long service life.