Weight : 29.5kg External dimension : 390mmX350mmX720mm Power : 750VA Average sound pressure level: 60dB Oxygen pressure : 30-60KPa Oxygen flow : 10L/min Oxygen concentration : 90%(V/V) -Select CECA top molecular sieve to stabilize oxygen production. -With ultra-long cumulative timing function, the total working time can be seen at a glance. With timing shutdown function, saving time and worry. - The compressor has a thermal protection switch to ensure the safety of the whole machine.