Question: Do they work as slave flashes? Do they have a function where they are triggered only by another camera flash?
Answer: They are continuous, not flash.
Question: Does this charge via usb-c?
Answer: The light is adopted a magnetic charging port. The special closed charging port design solves the problem of water ingressing into the charging port. Wapterproof to 32ft / 10 meters. And because this charging cable is exclusively designed by ulanzi, in order to prevent loss, we have included 2 charging cables on the package.
Question: Does this fit a Nikon d3500 camera?
Answer: If the camera has a hot or cold shoe built-in then it will fit. It comes with the cold shoe adapter.
Question: Will this light fit the sony aiii?
Answer: Yes! It bring 1/4" screw and hotshoe to fit any camera and lightstands.