The Packard PF42440 Control Transformer is a Class 2 rated, inherently limited transformer designed for low voltage control circuits. It features a foot mount design, making it easy to install and use. This transformer is built to last, with a minimum frequency of 5E+1 hertz and a maximum frequency of 60 hertz, ensuring reliable performance even with extended use. The product dimensions are approximately 4.1 x 4.1 x 4.1 inches, and it weighs 1.65 pounds. It has a primary voltage of 120/208/240 and a secondary voltage of 24, with a VA rating of 40. The wire length is 8 inches, and the product is available in a 2 foot mounting configuration. This transformer is ETL certified and is designed for over 60,000 hours of continuous use under normal load conditions. It is a reliable and durable choice for your power transformer needs.