Sennheiser ew 100 G4-ME 4 Wireless Bodypack System with ME 4 Cardioid Lavalier Microphone A1: (470 to 516 MHz)

Rugged all-in-one wireless system for presenters and moderators
Transmission range: up to 100 meters/ 300 feet
Easy and flexible wireless synchronization between transmitter and receiver via infrared
State-of-the-art live sound on A lightweight aluminium transmitter with integrated mute switch
Up to 20 compatible channels
Frequency range: A1: (470 - 516 MHz).

WIRELESS lavalier set. Includes: