This humidifiers use optical technology to create an antigravity vision that makes water droplets seem to flow slowly upwards while producing relaxing lights and sounds. It come with 800ml water tank . It emits a steady stream of cold fog that covers up to 322 square feet.4 square feet of room. It is designed for greater comfort. Simply take it with water, choose the setting you want and then enjoy the instant humidity and the aroma of your surroundings. Humidifiers are easy-to-use options. You can add a touch of magic to your night with its seven-color night light function. Choose your favorite color or let you between different tones for a relaxed and quiet atmosphere. It create a spa environment in your bedroom, living room, office etc, that improve air quality. drop-return.