This innovative underwater laser pointer is waterproof up to 100 ft deep. Perfect for pointing out undersea life without disturbing the reef. It is constructed of aircraft grade aluminum High intensity red laser beam Powered by 2 AA batteries Signal your diving partners easily Project a red laser beam and point out marine life and objects from as far as 5,000 feet away depending upon light and water conditions Interact with marine life without disturbing the natural food chain Many fishes will follow the beam Draw marine life out of coves for underwater viewing and photography This pointer has an on-off switch and can also be used on land