memoscan U581 Scanner is for real-time automotive diagnosis based on the OBD 2 & CAN-BUS protocol. It offers Full Feature Scanning including 'LIVE DATA'. By simply plugging it into your vehicles diagnostic socket, you will be able to Read all Trouble Codes & Definitions related to the "Check Engine Light", Save & Review results,Reset the trouble light, Monitor & Freeze-Frame Data,and more. Also retrieves the VIN (vehicle identification number) on supported vehicles.