Cola can design, compact, portable and supersonic anion. Can add the air humidity and turn the liquid into the mist. Pure water is recommended. If you want to add essential oil, you always make sure it will not corrode the water tank. Can refresh the air indoor, reduce the smog pollution and harmful radiation, and prevent the air-conditioning diseases. When the machine operates with noisy sound or mist significantly smaller, please turn off the button and add the water. Don’t touch the spray-chip at any time. Don’t operate the machine on humid places and don’t dismantle the machine. Powered by USB cable.