Maintains an ideal pH balance for better skin health by softening water quality used to produce mist, while reducing PM 2.5 particles to protect the respiratory tract. Prevents the formation of white dust inside the humidifier and around furniture through an ionic demineralization process. Extends the lifespan of the humidifier by minimizing white dust buildup, which can reduce performance and lead to early malfunctions. Compatible with models: DREO HM311/311S, HM524/524S, HM306. This demineralization cartridge is designed to enhance your humidifier's performance by ensuring cleaner mist output and reducing maintenance needs. Enjoy a healthier indoor environment with less dust and improved air quality, making it ideal for homes and offices. Color: As Shown Material: plastic Package Contents: 3*humidifier filter