I have the Megatech OE1, and that is simply not true.
Sorry
I'd recommend the OE1 rather than a Nikko, cuz the Sea Wolf can only dive 2 feet at the most. Mine broke after 3 runs, and that's pathetic, especially cuz the OE1 was only $50 when I bought it.
2 feet? They recommend 2 feet but I get mine down to 6-7 feet. And is still working without problem.