The Coway Airmega 400 model features smart mode (auto, sleep, 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 400 model is not Wi-Fi or app-enabled. With a coverage area of 1,560 square feet, the Coway Airmega 400 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. All Coway Airmega models come with two pre-filters and two Max2 HEPA filters. Enjoy Coway Airmega’s 30-day money-back guarantee, free shipping and easy monthly payment options.