True... but if you knew you were low on air, you would be heading to the surface and it wouldn't be an emergency.
As for any other emergencies... you're not going to spend the time texting until you have control of the situation and/or your faculties...
My point being... this is a novelty item. A high priced novelty item to boot! It does nothing more than a good buddy team with the proper equipment can accomplish... it's not going to replace any of that.
Ken
Bold statements with little to no information on the unit.
The range is almost 1/4 mile.
Buddy separation HAPPENS.
In addition to being a "novelty" - it's a real dive computer, digital compass, and more. While the price may by high, in time I think it will become less expensive? I was impressed with the unit - but I don't have one.
I would suggest you read the product overview. Overview
I wouldn't call it a "novelty" item. It's serious (at least what I saw about it)
For me... It doesn't do multi-gas... and I wouldn't invest in a computer that didn't give me options.