<em>Shure</em> RPM646 Microphone Boom and <em>Cable</em> Asssembly for Beta 54 and WBH54B Headworn <em>Microphones</em> (Black) RPM646 SHRPM646 <em>Shure</em> RPM646 Microphone Boom and <em>Cable</em> Assembly is designed to replace the boom and <em>cable</em> assembly found on the Beta 54 and WBH54B headworn <em>microphones</em>. The <em>cable</em> terminates to a TA4-Female connector. 90-Day Warranty