Due to the use of digital coding channels, so low energy consumption, and can run independently on 99 workstations, up to 99 studio addresses. Used to wirelessly trigger RFS 2-equipped Senso, Move, Scoro, and Brown Siros. The Brown RFS 2.1 works up to 200 m from brown outdoors or in a large room and up to 50 m in an enclosed room. The transmission speed (from transmitter to receiver) is 0.425 ms.