Speedo inaccurate

Hello, where does RD get its MPH reading from? Mine is about 40-50MPH off. Im using an android 11 tablet.

First thing to check is speed units. Go to ‘Settings->Units & Values’ and adjust the ‘Speed Units’.

If it is still wrong, I would need to know more of your setup, where is the speed configured to come from?

I changed it to GPS, so we will see.