This Hisense portable AC provides the utmost in performance more conveniently than ever. Airflow…is strong, cool and quiet due to the cross-flow fan design. Additionally, the louvers automatically open to a preset…position after the unit is powered on. To adjust the automatic louver, press swing once. Press swing again to hold…the louver at a desired direction. The included, snap-assembly window kit is easy to install for…windows 18 In. to 50 In. wide. This Hisense portable air conditioner cools, dehumidifies, and can function in fan mode. 3 Modes - cooling, fan, and dehumidifier Quiet operation, as low as 47 dBA Drain-free operation, so does not requireroutine draining due to internalevaporation of condensate water Snap assembly window kit