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'''Legacy Twin:''' This unit is two circular LNB units inside one plastic housing with two outputs. The multiswitched signal combines both satellites 110 and 119 to be carried on a single cable. Two cables may be connected to this unit for two receivers. The Legacy Twin points to two satellites in space.'''Legacy Twin:''' This unit is either one LNB or two LNB units inside one plastic housing with two outputs. For the dual LNB version the multiswitched signal combines both satellites 110 and 119 to be carried on a single cable. Two cables may be connected to this unit for two receivers. The Legacy Twin points to two satellites in space.'''Legacy Quad:''' This unit also has two circular LNB units inside one plastic housing, except with four total outputs. The multiswitched signal combines both satellites to be carried on one cable, and up to four receivers may be connected, one cable per receiver. The Legacy Quad points to two satellites in space.'''Legacy Quad:''' This unit has two circular LNB units inside one plastic housing, with four total receiver outputs. The multiswitched signal combines both satellites to be carried on one cable, and up to four receivers may be connected, one cable per receiver. The Legacy Quad points to two satellites in space. There is no legacy quad with only one LNB. '''Dish Pro Twin:''' This unit is two circular LNB units inside one plastic housing with two outputs. Polarization is converted so everything is vertical polarity. The Dish Pro Twin will not work with older legacy receivers. Allows for the connection of more than four receivers. This unit points to two satellites in space.'''Dish Pro Twin:''' This unit is either one LNB or two LNB units inside one plastic housing with two outputs. Polarization is converted so everything is vertical polarity. The Dish Pro Twin will not work with older legacy receivers. Allows for the connection of more than four receivers. This unit points to two satellites in space.