The Canton Combi 70 K is a program selector and switching unit that was manufactured in Germany between 1978 and 1984. This model is known for its sleek design, featuring a metal silver finish with black plastic components. The unit was priced around 150 DM at the time of its release. It is part of a larger series that includes several other models such as the Canton Combi 30, Combi 40, and Combi 300. Each model in this series offers various functionalities aimed at enhancing audio distribution and switching capabilities.