The Shure RPW184 KSM9 Cartridge is a high-performance microphone capsule designed for Shure wireless handheld transmitters (like the SLX-D or ULX-D systems). It incorporates a dual-diaphragm design for smooth, transparent sound and features switchable cardioid and supercardioid patterns for optimal control in varied acoustic environments. Known for its wide frequency range and superior transient response, the RPW184 is ideal for professional vocalists who demand clarity and consistency during live performances and broadcast applications.