The ultrasonic humidifier uses high-frequency ultrasonic waves to break water into very small particles that disperse into the air. Efficient and economical, it is equipped with a metal plate that vibrates at ultrasonic frequency. The sounds are inaudible to the human ear but have the ability to evaporate the water into a very fine mist. Maintaining the optimal humidity level is a way to create a comfortable atmosphere in your home and to prevent issues such as dry skin, cough, and throat irritation. Exposure to dust and pollution is reduced as the moist air captures dust particles, which is especially useful for individuals with allergies. The cool mists are very safe, as there is no risk of burns. They evenly distribute the humidified air around you, allowing you to breathe healthy humidified air at home and in the office, providing comfort to your skin. Cleaning the humidifier, both inside and out, especially the water tank, has never been easier. There are two ways to fill the water tank: you can bring water to a container and fill the tank where it sits after removing the top cover, or you can take the water tank to the nearest sink in your home. When the water tank is empty and needs refilling, the healthy air protection system stops the humidifier. Warning: do not use the device when it is without water. This device features an automatic shut-off function. If the device shuts off, refill with water and restart. After use, it is recommended to wipe it down rather than rinse it under the faucet. Use regular water, not distilled water.