A video overview is embedded below. It’s also possible to add an external microphone input to these cameras, but it’s considerably more involved than external power.

Google has announced a powerful new camera feature that allows Pixel users to shoot video from multiple angles by adding a wirelessly connected external camera. This functionality is possible ...

So, if you're buying it specifically to take advantage of the HDMI port and external monitor feature, and you don't own an Alpha camera, then you might want to double check your own camera plays ...