Voice notification when walking is not working

Hi, 

I am trying to figure out how to get voice notifications from my watch to my BT earplugs. The earplugs are connected through my phone and / or my watch. But I am not able to get this working for the walking activity. What I want is that the watch gives me the time which has passed for every km. For jogging I had this working, but I don't get it working for walking. Does anyone know how to do this?