A DishPro 21 (DP21) Multi-Dish Switch allows you to receive signals from two DishPro LNBF's and send these signals to a DishPro satellite receiver.
Use this switch to combine a Dish500 with a Dish300 or combine two Dish300's together. Both LNBF's and all receivers must be DishPro Series. You can't combine older Legacy LNBF's with DishPro LNBF's. This is a lower cost solution compared to adding the SW34 Switch. ONLY use the DP21 with DishPro LNBF's, like DishPro Twins and Quads, DishPro Receivers and non-DishPro receivers equipped with the DishPro Adaptor.