The Belimo FSLF120-US Spring Return Actuator is a high-quality 2-position damper actuator designed for central air conditioners. With a power source of corded electric and a voltage of 120V, this actuator provides a smooth and efficient operation. Its direct mount feature makes installation easy, while the United compatibility ensures seamless integration with various systems. Made in the United States, this 30-inch long actuator offers reliable performance and durability for your HVAC needs.