DIDEEP X4000Pro 1L Scuba Diving Tank Oxygen Cylinder Respirator Air Tank with Carrying Strap - Black ?1L capacity oxygen cylinder: The 1L oxygen cylinder allows the diver to stay 1-10 meters underwater for 10-20 minutes (depending on individual lung capacity and diving depth),perfect for beginners ?Supports 3 types of inflation: Manual high-pressure inflatable pump,refill adapter,electric inflator ?Durable aluminum material: Uses 6061T6 aluminum material and meets the manufacturing standards for diving equipment ?With pressure gauge: Designed with a pressure gauge to show how much air is in the diving tank ?Silicone mouthpiece: Equipped with an ergonomic silicone mouthpiece ?With pressure relief valve: Press and hold the top to vent the pressure inside the bottle ?Portable: Lightweight and portable design,can be taken on board after twisting the breathing valve ?Specifications: ?Material: 6061 aviation aluminum ?Maximum working pressure: 20MPA/200BAR/3000PSI ?Capacity: 1L ?Usage depth: entertainment air source within 10 meters,backup air source within 30 meters ?Usage time: 15~20 minutes (The specific time varies from person to person according to the diving depth and personal breathing rhythm skills) ?Inflation method: electric air pump/scuba adapter/high-pressure air pump ?Note: ?The pressure of the oxygen cylinder cannot exceed 20MPa (that is,200BAR or 3000PSI displayed on the pressure gauge) ?Before boarding,please separate the breathing valve from the bottle body. You need to press the top to release the pressure before separating the bottle body. Package included: ?1 x Oxygen Cylinder ?1 x Carrying Strap ?1 x Accessories Pack for Vulnerable Parts ?1 x Multi-language User Manual (Chinese,English,German,Japanese,French,Spanish,Italian,Russian)