Huawei WATCH 2 Faq page 6

Your suggestions will be reported to the product development team.
7:Is my watch waterproof/dustproof? Can I wear it while swimming or
diving?
Your watch has an IP68 water and dust resistance rating, which means you can use it
when washing your hands, cooking, washing your car, or when it is raining. However, the
watch is not designed for swimming, diving, or prolonged submersion in water.
8:How do I use Android Pay on my watch?
To learn more about Android Pay, visit the following official Google web page:
https://support.google.com/androidpay/answer/7293863?hl=en&ref_topic=6224829 or
contact Google through other means.
9:What can I do if I am unable to make calls on my watch?
Try the following to resolve the issue:
 Check that the Bluetooth call feature is enabled, and that the Bluetooth audio
function between your watch and phone is functioning normally.
 If your phone is connected to multiple devices that support Bluetooth calling, select
your watch from available devices and check that Phone audio is enabled.