DW-6065 TURBO-X underwater camera??

usually all digital cams cost more than 150 euros
so why does this digital camera cost 109 euros and it is also for underwater use? what is it that makes it cheaper than the others? what disadvantage does it have?

It doesn't have an optical zoom; there's just a fixed focal length lens. This cuts the costs a lot.

It says "waterproof" which I would take to mean you could use it in the rain, but that's not the same as being an underwater camera.