Air Stool is an air-purifier / humidifier. The six-step filter removes harmful substances. Air that goes through the filtering process is used for this product to function as a humidifier based on four humidifying filters. The water tank has a capacity of 4 liters. The user can control the level of humidification by adjusting the number of humidification filters, thus using the product reasonably according to the specific environment. The unique stool-type design creates a sense of sophistication, making the product look like a piece of furniture. Emotional light effects are used to easily deliver information to the user, such as the pollution level.