Luminous underwater navigation: Absorbs light to glow clearly even in low visibility conditions. This ABS diving compass provides reliable directional guidance at depths up to 50 meters, with an easytoread phosphorescent dial and needle. Convenient scuba tube attachment: Secure clamp attaches to your aqualung tube and includes an additional hanging loop, enabling hands operation while exploring underwater environments. Robust construction for diving: Made from durable ABS and organic glass, this compass withstands underwater working temperatures from 30C to +60C, making it suitable for a range of scuba and snorkeling adventures. Clear reading and display: Size 62 x 58 mm with large, bold numbers for quick orientation checks, helping you maintain your course during dives without interrupting your experience. Use scenarios: Lowvisibility dives (night dives or turbid water): Attach to your aqualung tube with the secure clamp for immediate navigation reference at a glance. Reef or wreck exploration: Clamp and hanging loop allow hands navigation while you observe, film, or photograph. Cold and warm water expeditions: Durable construction covers temperatures from 30C to +60C, offering reliable performance across environments.