Standard Horizon SSM-517A Earpiece Microphone f/HX270, HX370, HX471 & HX400

<p><strong>SSM-517A Earpiece Microphone for HX270, HX370, HX471 & HX400</strong></p><p>The Standard Horizon SSM-517A Earpiece Microphone is compatible with HX270, HX370, HX471, and HX400.</p> <!--- cis2:mm5sl5hm --->