Overview
Shure RK100PK RFI Resistant , Inline Preamp for all MX Models (White)
In-Line Preamplifier for Microflex Microphones. Boosts resistance to Radio Frequency Interference (RFI).
 
 Suitable for use with the following Shure microphone:
MC50, MC51
WL50, WL51
MX150, MX153, MX183, MX184, MX185, MX291
Beta 91, Beta 98
SM93
WBH53
WHB98H/C
PG185, PG30