Features: Professional grade Professional compass, designed specificallyfor underwater work like diving and swimming, it will lead you to the right direction all the time, able to work in the external environment of -30-60 degree Celsius and underwater 50m/16.4ft. High performance High precision and accuracy, the side window with red datum line helps you to check the location data at different angles with convenience. Two positioned pillars are set on the 0 degree and 180 degree of the graduated ring, you can rotate the ring to set the target direction. Luminous plate Equipped with a luminous dial plate, it will absorb the sunshine or light automatically, and give out light in the dark conditions for you to get the accurate direction data safely and conveniently. Easy to carry Attached with an elastic rope, high-density and wear-resistant, you can freely use it to strap the compass on your wrist, efficiently avoid losing or broken. Superior quality Made of high-quality ABS and PMMA material, the compass is waterproof and durable, lightweight enough to carry for underwater work without bringing additional burden. Specifications: Type: compass Material: ABS+PMMA Quantity: 1pc Item Color: Black,Blue,Gray,Y Underwater Work Temperature: -30-60 degree Celsius Storage Temperature: -22-140 degree Fahrenheit Diving Length: 50m/196.5inch/16.4ft(max) Size: 8.2*6.2*3.5cm/3.22*2.44*1.38inch(compass)(L*W*H); 88.5cm/34.78inch(cord length) Weight: 90g/3.17oz Packages: 1*compass 1*user manual 1*package box