Two Way Direct
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G-Hook-Y4: This G-Hook style earpiece features an in-line push-to-talk (PTT) with loud/clear audio. It can be used on either ear and is easy to clean and use. For use with Vertex VX231 VX261 VX264 VX451 VX454 VX459 EVX531 EVX534 EVX539 radios.
Replacement for Vertex MH-37A4B earpiece.