Could be wrong but I don’t think the OpenFit version is for running or biking - it’s mainly for the gym.

I have the OpenRun version and use it for biking and running and it’s great. I’ve been using these a lot running and I prefer these over my Sony noise canceling over ear headphones. There is just something about being outside and still being connected to surroundings - yes for safety but even beyond that - I just run better with my ears open to the air.

I’ve tried several of the bone conducting variety. Shokz is the easiest to use. They also just released a new version that has even better sound called the OpenRun 2 or something similar and it seems to have an even bigger bone conducting audio device.