The following watches can be paired to the goggles for open water swimming:

Apple

Apple Watch Series 7

Apple Watch Series 6

Apple Watch SE

Apple Watch Series 5

Apple Watch Series 4

Apple Watch Series 3

Garmin

Garmin fēnix 5 Plus

Garmin fēnix 5S Plus

Garmin fēnix 5X Plus

Garmin fēnix 6 Pro

Garmin fēnix 6S Pro

Garmin fēnix 6X Pro

Garmin fēnix 6 Sapphire

Garmin fēnix 6S Sapphire

Garmin fēnix 6X Sapphire

Garmin fēnix 7

Garmin fēnix 7S

Garmin fēnix 7X

Garmin Forerunner 255 Music

Garmin Forerunner 255S Music

Garmin Forerunner 745

Garmin Forerunner 945 

Garmin Forerunner 955

Garmin MARQ Collection

Garmin MK2

Garmin epix 2

Garmin quatix 7