The SurfConnect (Australia) coach said :
"SeaTalkie is the winner as it's fully waterproof, robust, straight forward and easy to use. We just clip on vests, don't even need helmet clips. Top for coaching. Highly recommended!"
Canyoning coach said (quote from whatsapps) :
"We tried it (SeaTalkie) yesterday. For a 40-50 meters height waterfall. The connection was very good when talking from the top to the bottom of the waterfall."
What could SeaTalkie do? See below youtube
Compatible to other walkies
SeaTalkie uses UHF radio channels which is compatible with other walkies. Which means that your team can use other brands of walkies together with SeaTalkie. Just set them all to the same channels