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). An excellent item for Scuba divers and snorkelers to keep ready for use in their dive bag. Spearfishing enthusiasts can also attach this to a spear gun to be used as an aiming device. Also great for fishing or boating trips, and just having fun playing games in and around home swimming pools. The picture above will vary in size depending on your screen resolution that you're running your monitor. Please read below under the features area for the exact measurements of this item. These can retail for as high as $299 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 more powerful professional model or the standard models, you'll be getting the best designed, highest quality scuba laser around, which you'll find here at Genaldi.com!