Ideations New Dive Alert Plus Version 2 Signaling Device - DV1 for All Standard Inflators

But when they wanted 3x the online price, well, good luck with that. It works. It clicked onto my lines easily. Nice "airhorn" on the surface - though I'd say try and cover your ears while you set it off. Underwater, a good whale fart to get people's attention. Granted though: tank banger, shakers, or tapping a metal link doesnt use a blurp of air.

Good for emergencies. You can hear from long distances

I used this one day in the water, and used it about 6-7 times underwater. It's not 'loud' by any means but, it does have a unique sound underwater so, lots better than a tank banger. Very easy to install, unobtrusive, looks like good quality.

No my wife can signal me also!

It's great for grabbing attention when you're underwater, particularly in cold conditions when you're wearing a hood. Rattles may not be loud enough, sometimes. Above water, it'll just about deafen you, it's so loud. Excellent in an emergency.

This is the best system I have found to get someone’s attention above and below the water when diving. Any layer of safety we can add to our gear is a definite must.

Does not fit Zeagle.

My old one was broken because of an accident. So I decided to order a new one. Never dived without it for almost 15 years.