Respirator Mask PTT Kit- All Kenwood Multi-Pin TK & NX SeriesP N: PTR NX 11: Kenwood: NX 200, NX 210, NX 300, NX410, NX 411, NX 3200, NX3300, NX 5200, NX 5300, NX 5400, TK 190, TK 2140, TK 2180, TK 280, TK 290, TK 3140, TK 3148, TK 3180, TK 380, TK 385, TK 390, TK 480, TK 481, TK 5210, TK 5220, TK 5310, TK 5320, TK 5400, VP6000, VP6230, VP6330, VP6430, VP5000, VP5230, VP5330, VP5430 & More. PolTact Respirator Gas Mask Comms Connector. Compatible with SOTR, Avon C50, M50, FM53, FM54, O2 Tactical Respirator Mask