Has anybody any further info/experience with the new Electronic Shark Defense System (ESDS)?

I see it does not have an antenna to zap you with and is very compact, fitting as a leg rope ankle strap, which is appealing as I would probably actually use it.

However.. I note the website states it will only work if it is submerged, and I don't know about you guys, but my ankle is not always submerged when paddling around..

Also, after a bit of googling i found sceptics as to shark repellents using electro magnetic pulses on all sharks. These reputable commentators also say defense systems should target particular species as one size doesn't fit all when it comes to sharks- they all rely on different senses to different extents.

Finally, I am not convinced by the videos the product manufacturers provide with dead fish etc showing the effectiveness. I have watched sharks go for dead fish hanging off back of boat and they don't go straight in and bite it, rather charge and turn away a few times before taking a bite.

Interested to hear thoughts from those more knowledgable than me on this topic..