Electrical power source, 1000000pcs/m³ anion density, ≤45dB noise, 50m³/h air volume, 30%-90% oxygen concentration, 1-5 liter / minute oxygen flux, <80% relative humidity, 5-40 degree surroundings temperature, 220V voltage, 90-watt power, 3.1 liter / minute included oxygen supply, CE certification.