GODNOEI 31.5-33.5 Inch Vertical Window Fan For Sliding Windows –Stepless Speed Control (0-2800 Rpm) Window Exhaust Fan Waterproof Vertical Window Fan With Living Rooms Bedroom Attics Garages

["❤️【PLEASE MEASURE FIRST】Designed specifically for sliding window with 31.5\"-33.5\" inner frame height (measure vertical window frame space, NOT glass height). Features 1.97\" extendable spring mechanism. This custom-fit design is tailored for your vertical window fan installation, ensuring a snug, gap-free fit without tedious adjustments.","❤️【MULTI-SCENARIO APPLICATION】Exclusive design for sliding windows, with an aluminum alloy frame ensuring firmly hold on the window frame. As a dedicated window exhaust fan, it’s ideal for refreshing the air in pet areas, smoky spots, or any space lacking proper ventilation—effectively expelling stagnant air and odors.","❤️【INSTANT SETUP】Truly no-tools installation - simply extend the spring-loaded frame, insert into window frame and tighten it. This hassle-free process lets you set up your exhaust fan for window in minutes; removable anytime without damaging windows or leaving unsightly marks.","❤️【SLIM DESIGN, WINDOW-FRIENDLY】Enables smooth window open/close operation with the fan in right installation place. Our compact window vent fan comes with 5 high-performance fans behind stainless steel mesh for safety and sturdiness, never interfering with your daily window use.","❤️【FLEXIBLE AIRFLOW CONTROL】Stepless speed controller can adjust the airflow effortlessly, ranging from a soft breeze to powerful cooling, with no fixed settings. The window fan suits every season and diverse requirements—blow in fresh air in spring or exhaust hot air in summer."]