Product explanation: Power: 100-240V Power supply: 50-60HZ Power: 400W Oxygen concentration: more than 90 Oxygen output: 3L/MIN and 4L/MIN Oxygen output pressure: 0.04-0.06MPa Noises: less than 50 Relative humidity: less than 80% Temperature: 5-40 degree Size: 380*310*600 MM Weight: 25KGS