Shure RK100PK RFI Resistant , Inline Preamp for all MX Models (Black)

The RK100PK is a black in line preamplifier for Microflex microphones, and Shure notes that it boosts resistance to RF interference. It sits in the cable run between a Microflex capsule assembly and the mixer input, supplying the active electronics the microphone element requires in installations where an in line preamp is preferred over an attached or surface mounted one.