Compatible with Yaesu & Vertex Standard VX-6, VX-6E, VX-6R, VX-7, VX-7E, VX-7R, VX-120, VX-127, VX-170, VX-177, VXA-330, VXA-700, VXA-710, FT-270, FT-270R, FT-277, FT-277R, FTA-550, FTH-107, FTH-108, FTH-208, PK-410 ^^ Compatible with Standard Horizon HX40, HX210, HX270, HX270S, HX280s, HX290, HX370E, HX370, HX370S, HX370SAS, HX380, HX400, HX400AS, HX460S, HX460SB, HX471, HX471S, HX500E-LI, HX500S, HX500SLI, HX500SBLI, HX600, HX600S, HX750S, HX751E, HX751L, HX760E, HX760S, HX850, HX850S, HX851, HX851E, HX851L, HX870, HX890 ^^ Compatible with Alinco DJ-V17T, DJ-V47, DJ-V446 ^^ Compatible with Yaesu Vertex-Standard, Standard Horizon, Alinco (MH-73 SSM-21A SSM-14A, 1-pin, 3.5 mm 4poles threaded)