Designed to fit into most double hung and slider windows (Measures approximately 13.3" x 25.5" x 6") Adjustable extender screen and bonus extender panel help to secure fan into larger windows (Can extend up to 37" with extenders) Dual blade operation with idependent electronically reversible motors allows for air intake, exhaust, or air exchange for full room circulation Plug in the power cord into a 120 AC Outlet. Refer to the PDF attached below in Technical Specification for User Manual. Troubleshoot- if air does not seem to be blowing in properly adjust airflow directional switch to intake. Note-for slider windows set the fan vertically in your window opening with the left side of the fan situated on the bottom and the built-in extender panel on top. Aluminium lock