High transparenct acrylic diving wristboard ensures light transmission for clear underwater communication, solves visibilities challenge in low light diving environment. Features adjustable wrist strap (up to 25cm circumferences) and corrosions resistant ABS construction, for effortlessly portability during extended dives. Ideal for professional diver, underwater photographers, and diving instructors requiring reliability communication tool during technical operations. for depth sea exploration, diving training, or marine research where precise underwater messaging is critical. Engineered with reinforced edges and quick dry, this underwater writing withstands saltwater corrosions longer than standard metal board.