[Luminous Diving Lanyard Included] - Package contains 1 luminous diving buckle rope designed for visibility underwater, keeping your camera, flashlight, or other gear close at hand in low light conditions. [Glows Up to 4 Hours] - Energy-storing luminescent rope provides 1-4 hours of bright glow when exposed to sunlight or a flashlight, making it easy to relocate your equipment even in dark or murky waters. [Robust PA6 and 316 Stainless Steel Construction] - Crafted from premium PA6 and 316 stainless steel materials for reliable toughness, suitable for extended outdoor and underwater adventures without easy damage. [Versatile Underwater Protection] - Practical for securing diving cameras, torches, and other valuable gear, this wrist strap and spring rope helps stop accidental drops while diving, snorkeling, or underwater exploring. [Multiple Size Options, Lightweight Design] - Choose from large (27.5*2.1cm, 14g) or small (19*2.1cm, 11g) to suit your needs; bright green color enhances visibility.