The 400S is equipped with Wi-Fi,* so that you can control your Airmega anywhere and at any time through the Airmega mobile app, including Smart Mode (Auto, Sleep, Eco) and real-time air quality monitoring. TRIGGER: || -- close The Wi-Fi*-equipped 400S lets you control your Coway Airmega smart air purifier anywhere, anytime using the Coway Airmega mobile app, including smart mode (auto, sleep, eco) and real-time air quality monitoring. With 1,560 square feet of coverage, the Coway Airmega 400S and 400 models offers the best air-purifying capacity and are designed to be used in 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. *Router frequency: Your Wi-Fi router should be set to both 2.4 and 5 GHz. In the absence of 5 GHz, you can set your router to 2.4 GHz only; 5 GHz will not work alone. Security: Your Wi-Fi security should be set to one of the following options: Open, WEP, WPA, WPAAES, WPA2AES, WPA2TKIP or WPA2. Improve your air with a dual Green True HEPA™ air purifier, thanks to Coway Airmega’s 30-day money-back guarantee, free shipping and easy monthly payment options. See details for more.