Ever needed to signal a friend or point out some marine life while scuba diving or snorkeling underwater, and couldn't? That won't happen again with this ingenious device which allows you to signal your diving buddy with ease, while also interacting with marine life without disturbing the natural food chain (Many fish will actually follow the beam). These are mainly used as signaling devices and will display a red dot at short distances in clear water. They aren't going to shoot a visible light saber like beam through water. Nevertheless, they're an excellent item for Scuba divers and snorkelers to keep ready for use in their dive bag. These can retail for as high as $79 each, but buying in large quantities allows me to pass the savings on to my customers and offer them at a greatly discounted WHOLESALE price. I have these custom made directly from the manufacturer, so my prices and quality can't be touched. Whether you purchase this model or the more powerful professional odel, you'll be getting the best designed, highest quality scuba laser around, which you'll find here at Genaldi.com!