OBD-A2 Features and Benefits: 1. Works with Volkswagen and Audi (Audi/Seat/Skoda/Jetta/Golf/Beetle/Touareg/GTI/ Passat and more) sold worldwide of 1990 or newer models 2. Reads and erases Diagnostic Trouble Codes (DTCs) of Engine, ABS, Airbags and Automatic Transmission. 3. Turns off check engine light 4. Highly reliable and accurate 5. Easy-to-read crystal-clear backlit 2-line LCD display 6. Easy to use with one plug-in 7. Stand-alone unit with no need for an additional laptop computer to operate 8. Small in size and conveniently fits in your palm 9. Performs continuous DTC scan 10. Specially designed for DIYers and car-owners 11. Safely communicates with the on-board computer 12. No batteries needed-power provided via detachable OBD II cable 13. User抯 manual contains VW/AUDI Diagnostic Trouble Code Definitions