Unique 3-in-1 Unit combines dehumidifier, humidifier and air purifier. Ion Generator and Air Filter: clean the air by removing airbourne particles and impurities. Humidifier Function: adds moisture to the air to help you breathe easier and keep you comfortable. Dehumidifier Function: removes moisture from the air, helps prevent mold and mildew and lowers relative humidity to keep you comfortable and protect furniture and appliances. Humidifier and Dehumidifier can be used seperatly or together to maintain the desired humidity level. Ideal for home and office use. Automatic Defrost Function: sensor automatically turns off the compressor when coil temperature drops. Wheels for easy mobility. Dehumidifier Capacity:25.36 pts./12 liters(30 degrees C - 86% relative humidity)per day. Working Range: 41-95 degrees F (5-35 degrees C). Capacity of Top Water Reservoir: 6.34 pts/3 liters. Maximum Room Size: Up to 27 x 27 square feet. Air Circulation: 90 CFM(cubic feet/minute). Refrigerant: R-134A. Sound Level: 48dB. Reciprocal Compressor. Removable water reservoir with 3.7 liter (7.82 pt)capacity. Pre-filter eliminates larger floating pollutant particles. Humidifying with warm vapor 1.05 pts/0.5 liters/hour. Grey.