The Coway Airmega 450 model features smart modes (auto, sleep, turbo, eco) and real-time air quality monitoring, so you can rest assured that the Coway Airmega is at work at all times. The Coway Airmega 450S model is Wi-Fi or app-enabled. With a coverage area of 3,285 square feet, the Coway Airmega 450 model offers the most air-purifying capacity as compared to our other products and can be used in extra larger spaces. Note: Coway Airmega is available for purchase, shipping and use only in the U.S. at this time. Airmega 450 comes with a 3-in-1 Fresh Starter+ custom filter for personalized air care.  Enjoy Coway Airmega’s 30-day money-back guarantee, free shipping, and easy monthly payment options.