1、Top Pressure Relief Valve: Press moderately to release the pressure easily, bite it after entering the water, and press it when you plan to inhale to release the pressure and drain. 2、Pressure Gauge: With luminous function, it is still clearly visible at 80m/262.5ft underwater, stainless steel material is waterproof, corrosion resistant, high hardness, and durable under pressure. 3、Breathing Mouthpiece: Made of food grade silicone material, safe and odorless. Ergonomically designed to easily bite and breathe. When connecting with the breathing valve, it must be tightened to prevent air leakage. 4、Breathing Oxygen Cylinder: Choose aviation aluminum, the surface adopts plastic spraying process, high pressure gas storage, durable and resistant to seawater corrosion. 5、Pleasant Diving Experience: With diving oxygen tank, inexperienced people can dive and feel the charm of the sea. Lightweight and more comfortable, no cumbersome equipment, diving free breathing equipment to provide you with better diving experience. Item Type: 0.5L Mini Scuba Tank Compressor Color: As Pictures Shown Material: Aluminum 6061-T6 + Stainless Steel Bottle Capacity: 0.5L Weight: Approx.1962g/69.2oz Surface Technology: Hard Oxidation + Spraying Maximum Pressure: 3000PSI/200BAR/20MPA Breathing Time: 10-15 Minutes (depending on Lung Capacity) Applicable People: Professional Diving (alternative Gas Source), Amateur Diving Enthusiasts, Lifeguards, Firefighters Carrying Method: Only Need to Disassemble the Bottle Body and Pressure Reducing Valve After Depressurization, You Can Take It on the Plane 1 x Oxygen Cylinder 1 x Breathing Valve 1 x Storage Bag 1 x Shoulder Strap 1 x Scuba Adapter 1 x Manual 1 x Accessory Package