If you do a lot of night diving, this produce is a great idea The Yoke Light integrates a marker light onto your regulator's yoke screw Replace the original with this light, and you've got a sort of tail light for your dive buddy to follow The light is a high-intensity LED that is powered by a lithium 2032 coin-cell battery, which is a fairly common battery
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Comments about Innovative Scuba Innovative Tank Valve Yoke Light Constant-on:
My wife and I really like these at night to tell who is who if you're in a group. They can be hard to open and close and can flood.
Overall a usefull product.