Vertex Standard MH-450S USED Speaker Mic compatibility in description

Vertex Standard MH-450S USED Speaker Mic EVX-261, VX-261, VX-264, VX-451, VX-454 VX-459

MH450S, Medium Duty Commercial Speaker Microphone with 3.5mm Audio jack

The Vertex Standard MH-450S shoulder mic is designed to work with the following Vertex Standard two way radios: VX-160, VX-180, VX-231, VX-350, VX-351, VX-354, VX-410, VX-420, VX-450, VX-451, VX-454, VX-459, EVX-530, EVX-531, EVX-534, and EVX-539 Series two way radios.