8; Reversible twin window fan with thermostat & LED; 3-speed rain-resistant motor for efficient air delivery; Automatically controlled by thermostat; Electrically reversible with LED temperature display; Pulls cool air in or exhaust stale air out; Built-in adjustable slide screens with lock; Two 8 PP plastic blades (6 paddles); Fully assembled; No tools required for installation; Safety grille; White;