The OMP RefractR BLS^TM Bowfishing Laser Sight is built for versatile use to provide a clear point of aim during bowfishing. This green laser sight is built with durable aluminum housing and is fully waterproof. This bowfishing sight is calibrated to account for light refraction underwater, eliminating guesswork for a true point of aim. Plus, this sight comes with mounting hardware and an accessible pressure switch for easy activation. Reliably accurate, the OMP RefractR BLS^TM Bowfishing Laser Sight gives clear aim for more success on your next bowfishing trip.