The Comfort Zone Living Comfort 9" Smart WiFi Dual Reversible Window Fan has a 3-in-1 design that allows you to choose from three different settings. The cooling setting brings in fresh air, while the exhaust setting removes stale air. The circulation option moves the blades on both fans in opposite directions for improved air distribution throughout your room. Three fan speed options help keep air moving at the volume you need to keep your space cool and comfortable. Select from low-, medium- or high-speed output for efficient air circulation that suits any environment. This fan also features accordion expanders that can be extended from 23-1/2" to 37" to adjust to the size of your window. Once the fan is in place, the expanders can be locked to secure it within the window frame. The included feet can be attached to use the fan on a tabletop, for added versatility and convenience. The Comfort Zone Living Comfort 9" Smart WiFi Dual Reversible Window Fan is WiFi enabled, so you can control your fan with the Comfort Zone app or with Voice Assistants. You can turn the fan on and off and change speeds and/or modes all from the convenience of your Smart devices. To get started, simply download our Comfort Zone® app, which is compatible with both iOS and Android operating systems, from either the App Store or Google Play. Once installed, follow the in-app instructions to setup the app and link it to your Smart device to begin controlling the fan from anywhere with ease. The Comfort zone Living Comfort 9" Smart WiFi Dual Reversible Window Fan comes complete with a removable screen to keep bugs out and a removable cover that offers protection and coverage when the fan is not being used.