Can anyone tell me whether or not I need to buy the separate wireless unit so that I can display Di2 information on my Garmin and connect to the E-TUBE app on my phone?
My groupset is the Shimano Ultegra 8070 Di2 and my bike is a 2019 Specialized Tarmac SL6 pro disc.
I thought it came as standard until I tried to connect it up. Or, am I just doing something wrong?
Thank you in advance!