Active oxygen has strong oxidizing properties, which can destroy bacterial RNA to effectively kill bacteria and inhibit growth, and ultimately form clean substances such as O2/H2O/CO2 and environmentally friendly and harmless. The release of oxygen can effectively inhibit the growth of ethylene ripening agents and molds on the surface of fruits and vegetables, and prolong the preservation period of food. Active oxygen can strongly oxidize pesticide residues in fruits and vegetables and destroy harmful factors. The purification method of strong oxidation is more efficient than washing the surface of pesticide residues. Features: Product name: refrigerator purifier (USB charging) Material: ABS/Stainless Steel/TPU Net weight: 255g Amount power supply: 5V=1.5A Working power: <0.5W Effective range: 1.5 square meters Working environment: -10-45°C Battery capacity: 2600mAh Charging method: Type-C Battery life: about 15 days (regular file), about 4 days (enhanced file)