Due to government regulations, some wireless products will not work in certain areas. This product works on the B frequency band. The fourth-generation Evolution wireless series makes professional wireless technology even more simple, flexible and reliable. For musicians, filmmakers, convention speakers and for use in the auditorium: G4 is a system that grows with you. The SK 100 G4 is a robust bodypack transmitter designed for daily use on stage with Evolution wireless G4 100 G4 systems. Features Robust bodypack transmitter for daily use on stage. Easy and flexible wireless synchronisation between transmitter and receiver via infrared Fast frequency allocation for up to 12 receivers via new linking functionality Up to 20 compatible channels Up to 42 MHz bandwidth with 1680 selectable frequencies, fully tunable in a stable UHF range Transmission Range: up to 100 meters