Shutter Exhaust Fan with Remote: Grille Diameter: 13 inches, Louver Size: 10.9 inches x 10.9 inches, Mountable Thickness: 8 inches, Power Cord Length: 8 ft, Airflow: 850 CFPM. Helps you to promote the circulation of air inside the room and purify the air. Stay fresh and stay comfortable! Sealed EC Motor: High performance, low energy consumption and low noise. We chose a powerful EC motor with a maximum speed of 1948 rpm and 8 adjustable fan speeds to better meet your ventilation needs in different scenarios. Remote Control: Use the remote control for convenient control. With the remote control, you can switch the fan on and off, control the wind speed (8 speeds), and set it to turn off after 1-8 hours.