NDX 12-inch cooler fan, two motors, one for movement and one for airflow. The front motor rotates while the rear one distributes air. The inner motor is the main motor that provides airflow. You can set the timer as you wish; it will automatically turn off after the set time. It is still new in the box. If you want to buy it, you can; it provides very good airflow. If interested, please call directly. I request you not to send SMS. Thank you.