Max. Flow: Approx 3+/-1.5L/min (standard atmospheric pressure) Oxygen density:29%+/-2% (standard atmospheric pressure) Size: 230(L)*110(W)*160(H)mm Weight: Generating unit+ adapter 2.00KG AC100V-240V(according to/DC12V-16.8V(direct) adapter) Power Consumption: average below 32W Noise: below 48dB