Parameter: Power: 2.2KW; Voltage: 110V/60HZ; Air Flow Rate: 100L/min (3.5cfm); Max. Pressure: 4500psi / 300bar /30MPa; No.of stage and cylinder: 4 ; Cooling Method: Fan Cooling; Stop Model: Automatic Shutdown After Full-Filling; Product Dimension: 30.7 * 17.7 * 19.2 inch; Package Weight: 92lbs / 42kg. Multi-layer Filtration: It includes air filter, water-oil separator and activated carbon molecular sieve filter. This filtration system ensures that the compressed air removes any liquid water and oil pollutants from the air flow, as well as any residual trace hydrocarbon vapors and other impurities. It's critical for applications like scuba diving, where the compressed air needs to be extremely clean and pure. The lubricante oil recommendation: ISO grade 100/150 standard lubricating oil. Pressure Guage & Fan Cooling: The pressure guage allows the user to precisely monitor the current inflation pressure, rather than relying on estimated or indirect readings. Accurate pressure monitoring also helps optimize the compressor's performance and efficiency. If the tank is being filled, the air compressor will automatically shut down after being filled. At 4500 psi, the compression process generates a significant amount of heat that needs to be effectively removed. The fan cooling system rapidly dissipates this heat to prevent the compressor from overheating and potentially becoming damaged or unsafe. 4 stages & 4 cylinders: The 4 stages of compression allow the compressor to efficiently and safely build up the pressure to the very high 4500 psi output. Each stage uses a separate cylinder to compress the air in multiple steps. This distributes the work and avoids generating excessive heat, allowing for intercooling between stages to further improve efficiency and prevent overheating. 4 cylinders provide good volumetric airflow capacity to fill high-pressure tanks and containers quickly. Wide Application: This compressor can be widely used in diving, firefighting, outdoor construction, pipe welding, contain welding, scientific research and pressure testing, and PCP rifle/paintball. The combination of the 4500 psi pressure capability, 4-stage compression, advanced filtration, and efficient cooling make this portable and safe compressor well-suited for a diverse range of applications where very high quality, high pressure air is required.