1、Constant pressure accuracy, airflow output, explosion safety accuracy. Can reach the industry leading level. 2、Master valve switch: control the outflow of gas switch. 3、Pressure gauge: check the volume of gas in the bottle. 4、One-way air filter: double filter gas breathing pure oxygen. 5、Explosion-proof valve: external explosion-proof valve, safer to use. 6、Vacuum chamber: equalize the gas pressure in the bottle, achieve constant pressure function. Smooth gas outflow, breathe more smoothly and reduce gas waste. 7、Explosion-proof valve: external explosion-proof valve. The explosion-proof index is more accurate and easy to replace. 8、Master valve switch: the air source can be completely closed, air leakage can be stored together with pressure reduction bin to adjust the amount of air outflow required by each person. 9、Pressure gauge: With luminous function, 80 meters underwater is still clear. Made of stainless steel, waterproof and corrosion resistant, high hardness, pressure resistant and durable. Dial design clear visible, an accurate identification of the pressure value. 10、Unidirectional gas-filled filter: dual filtration gas 0.03 micron primary filtration. Polymer secondary filtration. 11、Breathing bite: fit the air in the breathing bottle after biting. 12、Top pressure relief valve: press down to relieve pressure and discharge the gas in the bottle (please pay attention to the pressure relief after entering the water and biting down to prepare to inhale, and gently press the pressure relief to drain water). 13、High quality fluorine rubber ring. Compared with other rubber rings on the market: more wear-resistant, better sealing, greater hardness, more resistant to seawater corrosion, withstand greater pressure. 14、Oxygen cylinder: it is made of 6061 aviation aluminum material with high pressure gas storage technology and durable, seawater corrosion resistance, capacity of 1L. 15、Portable strap: not easy to fall off, save effort. 16、360° rotary interface :360° unbound rotary, connecting medium pressure tube. 17、3 charging methods: 1. High-pressure pump: portable and spare. 2. Scuba adapter: large bottle guide to small bottle. 3. Electric pump: easy to pump 18、Applicable to professional diver (backup air source), fisherman, novice diver, amateur diver, fireman, lifeguard, etc. Condition: 100% Brand New Item Type: Diving Valve Set Material: Aviation aluminum + silica gel + plastic Capacity: 1L Maximum pressure: 3000 PSI/200 BAR/20MPA Available time: 15-20 minutes Oxygen cylinder size: approx. 28.5x9cm/11.2x3.5inch Level 1 valve size: approx. 3.5x7.8x9.5cm/1.4x3.1x3.7inch Level 2 valve size: approx. 9x11x8cm/3.5x4.3x3.1inch Tube length: 69cm/27.2inch 1 x Level 1 Valve 1 x Level 2 Valve 1 x 1L Oxygen Cylinder 1 x Accessories Bag 1 x Tube 1 x Manual