Feature: 1. 360° one‑stage rotating valve head can effectively prevent the winding damage of the medium‑pressure pipe and effectively reduce the potential safety hazards. Equipped with a master valve control switch, which is opened to maintain gas flow during inflation and breathing, and the valve can be closed to avoid air leakage when it is not used up. 2. Pressure relief valve on the top of the breathing valve can release pressure and release air by pressing it down. One‑way air filter, double filter design, breathe pure air. The luminous waterproof pressure gauge is still clearly visible at a depth of 80 meters underwater. 3. Made of food‑grade silicone material, the mouthpiece is dustproof, odorless, more consistent, and does not crack. Imported rubber ring effectively prevents air leakage, no water ingress, and is safer. With a dust cap to protect the intake nozzle and prevent bumps from affecting performance. 4. The diving goggle is designed with liquid silicone head band and PC lens, so there is no need to worry about water seepage on the seamless joint surface. The adjustment button can adjust the length of the goggles according to the size of the individual's head. Environmentally friendly silica gel is non‑toxic, odorless and has water resistance and corrosion resistance. 5. High‑pressure pump, 40MPA oil‑filled anti‑shock luminous pressure gauge, internal oil is used to prevent the pointer from violently swinging, and the oil‑water filtration effect is stronger. The oil‑water separator can absorb and filter oil and water up to about 99%. It is equipped with 8mm quick‑connect female connector and 8mm quick‑connect male connector as standard. 6. Using elastic mesh material, filled with waterproof and quick‑drying material, the oxygen cylinder holder bag is quick‑drying, breathable and durable. Reflective strips on the shoulder strap for easy identification. In addition, it is equipped with a mother‑in‑one buckle, which can be quickly buckled in emergency situations and can be easily unlocked, safe and fast. Specification: Item Type: 1L Portable Diving Oxygen Tank Material: Aviation Aluminum 6061+Rubber Hose+Food Grade Silicone Mouthpiece Oxygen Cylinder Height: Approx. 28cm / 11.0in Oxygen Cylinder Diameter: Approx. 9cm / 3.5in Hose Length: Approx. 65cm / 26.0in Product Weight: Approx. 2812g / 99.2oz Thread Size of the First-stage Pressure Reducing Valve: M18x1.5, equipped with a 360-degree rotating head Oxygen Cylinder Specifications: 1L Air Capacity: 200L (compressed air) Inflation Safety Pressure: 3000PSI/200BAR/20MPA Breathing Frequency: About 132 breaths for sleep Available Time: About 20 minutes (depending on personal vital capacity and personal diving skills) Applicable People: Professional diving (alternative gas source); amateur diving enthusiasts; lifeguards and firefighters. Carrying Method: Just disassemble the bottle body and pressure reducing valve after depressurization, and then you can take it on the plane.. Package List: 1 x Pressure Reducing Valve + Hose + Respirator Kit 1 x 1L Oxygen Tank1 x Oxygen Tank Holder Bag1 x Diving Goggles1 x Vulnerable Parts Kit (7pcs) 1 x Multi-Language Manual Note: 1. According to diving industry standards, the safe working pressure of diving cylinders cannot exceed 20mpa (20mpa=200bar=3000psi)2. The gas is recommended to be used up within 48 hours.