DISH dp-34 is the officially produced switch that works with Dish Pro LNBs and receivers. Microyal DP-34 is made in Taiwan maybe by the same company maybe by another company that has reverse engineered the product. DISH will warranty their DP-34 but not Microyals. Microyals product will cost you less and seems to work but I wouldn't be surprised if DISH made some slight change in their software that would defeat Microyals competing product. DISH does not like people having a second source of their products they like to control the price of components. The DP-34 I have in stock says Made in China, not Taiwan though Taiwan is part of China.