M2 Duet System  M2T - IEM/IFB Transmitter

Sennheiser AVX Lavalier Set, includes Bodypack transmitter, MKE-2 lavalier mic, and EKP plug-on receiver.

Sennheiser Dual Channel IEM System: (1) SR 2050XP IEM dual channel stereo IEM transmitter; (2) EK 2000 IEM stereo IEM Receivers with IE4 Earbuds, Frequency Range A (516 / 558MHz).

Sennheiser EW100-G4, ENG Combo System.  evolution wireless G4 Evolving with you.

Rugged all-in-one wireless system with high flexibility for broadcast quality sound. 

Sennheiser EW112P-G4, Portable System. Consisting of Bodypack Transmitter With ME2 Omni Lavalier And Portable Receiver, Block A1 (Frequency range 470 – 516 MHz)

Sennheiser EW112P-G4, Portable System. Consisting of Bodypack Transmitter With ME2 Omni Lavalier And Portable Receiver, Block G (Frequency range 566 – 608 MHz)

Sennheiser EW100-G4, ENG Combo System.