With a single touch, you can use the air purifier function, the negative ion function, and the air purification function of the circulating fan. It removes 99.9% of viruses in 2 hours and is also helpful for hay fever. The fan also supports aromatherapy; just add a few drops of your favorite aroma oil, and the aroma will circulate with the air from the circulator. It always keeps the space clean, fresh, and comfortable. Operation confirmed.