Vertex Standard AAE46X007 MH-66A4B IP57 submersible speaker microphone VX-450, EVX-530 series

I use this with the Vertex Standard EVX-534 (530 series) and this works awesome. The speaker is a little low for me but I use a surveillance kit (audio only 3.5mm) and this works just fine. The picture shows that it comes with the thumb screws but mine came with the small Phillips head screws. The cord is about 1 foot long un-stretched and is long enough for me to place it behind my back, over my shoulder opposite side and nearly bring it back to the radio. I would say that the cord is able to stretch to 3 feet long if needed. I am 6'0 tall and 240 lbs, in case you were wondering about my stature.

Very good mic durable