My buddy and I found we needed something like this...
My buddy and I found we needed something like this after a few experiences where we missed spotting amazing fish or similar on very fast drift dives, but also for safety uses underwater it sounds (ha ha) like a good idea.
I got this unit, my buddy bought the Aquatec Scub Alert - both work great underwater to get the attention of the buddy without annoying everyone else in the water. Haven't had an opportunity to test it above water yet but I am sure it will be a valuable addition to avoiding "Open Water" (the movie) scenarios.
However, keep in mind this unit is about twice the size of the Scub Alert or earlier models, and it takes a dive to get familiar with "all the extra" buttons right before the inflator hose buttons, so make sure you get a chance to familiarize yourself with the new setup before you go on unknown or difficult dives.
Recommend to a friend? Yes
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