Gemini is available on the Pixel Watch 4 with just the flick — er, the raise — of your wrist. This feature is called Raise to Talk; it’s off by default, but you can turn it on in your settings and watch preferences in the Pixel Watch app on your Pixel phone or directly on your watch.
All you need to do once the feature’s enabled is bring your watch a few inches from your mouth, and start chatting. You don’t even need to say “Hey Google” — you’ll still see a blue light subtly flash at the bottom of your watch’s display so you know Gemini is listening.