Feature:1. The mouthpiece of the breathing apparatus is made of food‑grade organic silicon material, which is non‑toxic, and safe to use.2. With a top pressure relief valve, easy to operate, just press the top to remove the gas in the bottle.3. luminous pressure gauge, stylish and beautiful, suitable for use in dark environments.4. Small size, lightweight and portable, easy to carry and store, bring you a lot of convenience.5. Helping you to dive underwater completely freely, this is a practical and reliable diving equipment.Specification:Item Type: Diving Air TankMaterial: Aluminum alloy + stainless steel + siliconeColor: As Pictures Shown Air Tank Size: Approx. 29x6cm/11.4x2.4inWeight: Approx. 1760g/62.1ozMaximum pressure: 30000SI/200BAR/20MPABreaths: About 170 breaths per breath at 0.5 LLTERSIt can be used for more than 10 minutes (deep sea within 10m)Surface process: hard oxidation and spraying, seawater resistance for more than 500 hoursDuration of different water layers1-3m, about 8-10 minutes3-7m, about 6-8 minutes7-10m, about 5-6 minutesOxygen cylinders are shipped without gas, inflation methods: high-pressure cylinders, electric air pumps, adapters Package List:1 x Breathing Apparatus1 x Adapter1 x Storage Bag1 x Manual 1 x Oxygen Tank1 x Anti Fall Rope1 x Hanging Rope