How can I connect my mobile application , goggles fitbit , with my mobile garmin application
How can I connect my mobile application , goggles fitbit , with my mobile garmin application
You need Instinct 2 for the respiratory rate. Indeed not supported by the old model, exactly as Andy wrote: Garmin | Compare
As for the Fitbit goggles, Non-Garmin devices cannot be directly linked to Garmin Connect, again as Andy wrote, but you can still import the activities from the goggles manually to GC Web at https://connect.garmin.com/modern/import-data