This 2-speed Strongway 36in. Open Motor Belt-Drive Drum Fan features a 4-blade design for even airflow. A belt driven fan runs quieter and creates a lower load, prolonging the life of the motor. Low vibration levels produce smooth and quiet operation for any location. 2, Volts 120, Watts 560/450, Amps 5.0/4.0, Fan Diameter in. 36, HP 1/2. 2-speed motor allows user to select desired amount of cooling Belt-drive motor runs quieter and creates a lower load on the motor for longer life Low vibration levels produce smooth and quiet operation A 4-blade design provides even airflow Durable rubber wheels provide portability Antiskid stopper feet keep fan in position when operating