The Sennheiser EW IEM G4-GB is a professional-grade wireless in-ear monitoring system built for the demands of live performance, broadcast, and theatre. Operating in the GB frequency range (606–648 MHz), it delivers clear, reliable stereo audio with outstanding RF stability and user control.This all-in-one set includes the SR IEM G4 stereo transmitter and EK IEM G4 bodypack receiver, both housed in rugged, stage-ready enclosures. With infrared syncing, wide tuning bandwidth, and intuitive OLED displays, it’s ideal for musicians, engineers, and presenters who need consistent in-ear monitoring on any stage.