Aqua : Picture 1 regular $26.95

About H2YO Underwater Noisemaker Clank

The problem you've just seen a great white. You're out of air. Or perhaps you discovered a gold brick in the sand. How do you get your buddy's attention, or help from others? The solution give Reef Net's new "H2YO" a shake to emit a loud and distinctive rattle that can be heard at great distances underwater. Well maybe it's not that drastic of a problem, but you get what we mean! Maybe you just found a hole full of lobster or super macro shot you want your buddy to photograph. The Noisemaker is made from durable plastic with a large internal ball and steel split ring for attachment to gear. There are many reasons to use an H2YO instead of alternative signaling devices. It can't be forgotten on shore/boat like a tank banger since it stays on your BC. The sound pattern is unique and easily identifiable. Does not sound like a tank banger...the days of wondering "who's banging?!" are over. It doesn't require an air supply like many other noisemakers. It doubles as a gear identifier (different colors for different people) and it's virtually indestructible.

H2YO Underwater Noisemaker Clank Features

  • H2YO Underwater Noisemaker Clank
  • Great Underwater Signaling Device
  • Shake to Emit a Loud and Distinctive Rattle
  • Can Be Heard at Great Distances Underwater
  • Why H2YO Instead of Alternative Signaling Devices?
    Can't be Forgotten On Shore/Boat Like a Tank Banger
    Stays-On Your BC
    Sound Pattern is Unique and Easily Identifiable
    Does Not Sound Like a Tank Banger, Days of Wondering "Who's Banging?!" Are-Over
    Doesn't Require Air Supply
  • Doubles as Gear Identifier (different colors for different people)
  • Virtually Indestructible
  • Durable Plastic with Large Internal Ball
  • Steel Split Ring for Attachment to Gear

H2YO Underwater Noisemaker Clank Specifications

Type (Pneumatic/Manual)
Shake by Hand
Plastic, Steel Ring and Ball Rattle
Available in the Following Colors:
Green, Orange, Pink, Yellow
Weight [with packaging]
0.35 lb
Mfr #

H2YO Underwater Noisemaker Clank Customer Reviews

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(based on 1 review)

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Long Lasting Noise Maker.

By M Diver

from Texas

See all my reviews


  • Solid product


    Best Uses

      This is a good Noise maker. I have dove with mine for 10 years. It is still like the day I bought it. I never have any problem getting attention with it. The clank is better than the rattle because it does not make noise unless you shake it. I keep mine tethered to my BC so I do not drop it and I tuck it in a pocket when I am not shaking it.

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