High quality brand new from factory, clear air tube surveillance kit Enhance Communication: This earpiece produces high-quality sound. Users hear transmission clearly and receive effectively Cozy Material: Users wear soft and skin-friendly material that fits right outside earlobe User-Friendly Design: Metal clip on the PTT back clips securely onto lapel, collar or tie. Users are easy to adjust Works with the following: Motorola EVX-S24, Yaesu VX-6R VX-7R VX-6E VX-7E VX-120 VX-127 VX-170 VX-246 VX-270 VX-177 VX-700 VX-710 VXA-220 VXA-300 VXA-700 VXA-710 FT-270 FT-270R FT-277R, Icom IC-4300 IC-M25 IC-4300L, Alinco DJ-G29T DJ-G7T/E DJ-V17 DJ-V27T DJ-S17Standard Horizon Marine Radio HX890 HX210 HX380 HX400 HX400IS HX407 HX870 HX851 HX850s HX750s HX600s HX500s HX471s HX470s HX460s HX370s HX290