How to pair your Apple Watch with a Bluetooth headset
-Press the Digital Crown to go to your Apple Watch's Home screen. (If you aren't there already.)
-Tap the Settings app.
-Tap Bluetooth.
-Tap the name of the device you want to pair with.
Ikke prøvd selv. Men fant denne på nettet. Men ser klokka søker, så ser ikke noe grunn til at det ikke skal gå
Eller se her
https://support.apple.com/en-us/HT204218