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

Apple

Apple Watch Series 8

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 D2 (Mach I, Delta, Delta PX and Delta S)

Garmin Enduro 2

Garmin epix 2

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 fēnix 7 Sapphire

Garmin fēnix 7S Sapphire

Garmin fēnix 7X Sapphire

Garmin Forerunner 255

Garmin Forerunner 255S

Garmin Forerunner 255 Music

Garmin Forerunner 255S Music

Garmin Forerunner 745

Garmin Forerunner 945 

Garmin Forerunner 945 LTE

Garmin Forerunner 955

Garmin MARQ Collection

Garmin MARQ (Gen 2) Collection

Garmin MK2

Garmin tactix 7

Garmin quatix 7