The NCC Nationa Controls Corp 105-135VAC 50-60Hz Program Control DNC-T2020-B10 is a reliable and efficient industrial control system manufactured by NATIONAL CONTROLS. Designed to operate on a wide range of power supply voltages (105-135VAC) and frequencies (50-60Hz), this program control is suitable for various industrial applications requiring precise and consistent control. With its durable construction and dependable performance, the DNC-T2020-B10 is a valuable asset for businesses seeking to optimize their operations and enhance productivity.