The Icom HM-166LA Earphone mic is great for those who need an inconspicuous earpiece, work in loud environments, or require private communications. Works with mostIcom: IC-F3G, IC-F3GS, IC-F4G, IC-F4GS, IC-F11, IC-F21, IC-F14, IC-F14S, IC-F24, IC-F24S, IC-F31, ICF33G, IC-F43G, IC-F43TR, BC100, IC-F1000, IC-F2000, IC-F1000D, IC-F2000D, IC-F3001, IC-F3011, IC-F3021, IC-F3021S, IC-F3021T, IC-F3031, IC-F3210D, IC-F4210D, IC-F4031, IC-F3101D, IC-F4101D, IC-F4001, IC-F4011, IC-F4021, IC-F4021S, IC-F4021T.
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