The SPM-100 series includes a 3.5mm earphone jack for listen only use. Compatible with the following: Kenwood Multi-Pin Radios TK2140, TK2180, TK3140, TK3148, TK280, TK290, TK380, TK390, TK480, TK481, TK190, TK3180, TK5210, TK5220, TK5310, TK5320, TK5400, NX200, NX300, NEXEDGE Series.
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