These types of devices are used by mechanics to interpret DTCs (Diagnostic Trouble Codes) from your vehicle. Now you can do this yourself, by simply plugging the device into your vehicle’s OBDII port, and streaming the information to an app on your mobile device or computer. The app will interpret the information for you to identify the issue.
Accurate and easy to use OBDII scanner
Get a professional mechanic’s view of key vehicle systems
Read Diagnostic Trouble Codes, both generic and manufacturer specific
Detects live sensor data: fuel system status, calculated load value, coolant temperature, RPM and more**
Wirelessly stream the real-time data to an app on your mobile device or computer
Compatible with OBDII or eobd compliant cars (1996 or later)*
Recommended for use with Android devices
Manual @ https://assets.kogan.com/files/usermanuals/KABTELM327A-QSG.p…
Does the quality of these vary much? Gearbest seem to have a similar one for $5 and Lightinthebox for $9. I'm not sure if there is any difference though.