Make others aware of interesting features from a distance with the red beam of the Aluminum Underwater Laser Pointer from Innovative Scuba Concepts. Weighing in at only 4 ounces, the aluminum construction is waterproof to 130'. A simple twist tailcap turns the pointer on, with up to one hour of runtime. A lanyard is included to aid in retention, as is a tube of silicone to waterproof the threads.