I call this the knock of rk-56 made my sky burner

Product Description 4-pin Dynamic noise cancelling Microphone

Available in Black, and Chrome

4-pin Microphone Dynamic noise cancellingFlexible heavy duty 9' coiled cordHigh impact ABS plastic

This mic is brand new i will modify this and put back in package.

I modify this mic and make this rk-56 sound like your natural voice not muffled works great i use this on all my radio's next best thing to the tylex original rk-56

$45.00 only