The transformer kit fit all new RoomMatch® utility loudspeaker models after removing the standard input connector panel. The new RMU loudspeakers have two NL4 connectors on the input connector panel. This transformer kit cannot be used with earlier versions of RMU208 loudspeakers which have only one NL4 connector on the standard input connector panel. It is suitable for hotel ballrooms, conference/meeting centers, conference rooms, sports facilities, convention centers and houses of worship.