Sennheiser EW G4   bodypack transmitter with 1/8" audio input socket (EW connector), frequency range: A (516 - 558 MHz

Sennheiser EW G4   in-ear monitor system, E-range (821-832 MHz/863-865 MHz) EU license free

Sennheiser EW G4   twin in-ear monitor system, A-range (516-558 MHz BE)

Sennheiser EW G4   Twin In Ear Monitor System, B-Band (626-668MHz, NL)

Sennheiser EW G4   In Ear Monitor System, E-Band (516-558MHz, BE/D)

Sennheiser EW G4   In Ear Monitor System, B-Band (626-668MHz, NL)