The Bionaire Remote Control Twin Window Fan disperses invigorating, revitalizing coolness for maximum comfort and freshness. Lifeless air dissipates to breaths of nourishing air and the renewing effects of cooler air become more present in your surroundings. Electronically reversible blades allow for air intake, exhaust or air exchange to maximize cooling efficiencies. The three speed settings allow you to control the amount of airflow for optimal cooling comfort. Remote control operation provides the ultimate in convenience. The programmable digital thermostat provides easy to read visual indicators to better monitor your every cooling need. This window fan is designed to fit most double hung and slider windows.