Tobsun DC-DC converter EA15-5V documentation?

I have a couple of Tobsun DC-DC converters, specifically an EA15-5V. This converts 12V to 5V 3A. I can’t find any documentation on this thing and want to know the circuit design for this guy. Is it a buck converter or something else? Anyone have documentation on this thing? Here’s a pic and link:

It is almost certainly a buck converter. There would hardly be any other way of reducing 24 volts to 5 volts at 3 amps without a massive heat sink.

I would guess that the output is not isolated, that is it shares a common ground with the input.

There is quite a lot of detail on that Amazon page when you scroll down. What else do you need to know ? if you are really curious, you could "un-pot" it.

Thank you for the input!