Motorola MH-66A4B AAE46X507 Remote Speaker Mic
Motorola MH-66A4B remote speaker mic is compatible with the Motorola VX-450 and EVX-530 Series two way radios which are rated as IP57 waterproof. The Motorola MH-66A4B is also compatible with Vertex Standard VX-450 and EVX-530 Series two way radios. Motorola's manufacturing number is AAE46X507.
The Vertex Standard MH-66A4B remote speaker microphone is only rated as IP57 waterproof and submersible with the below Vertex Standard two way radios:
VX-450, VX-451, VX-454, VX-459, EVX-530, EVX-531, EVX-534, and EVX-539
The Motorola MH-66A4B will operate with many other Vertex Standard two way radios BUT IS NOT RATED AS WATERPROOF WITH THESE RADIO MODELS:
VX-160, VX-180, VX-230, VX-231, VX-350, VX-351, VX-354, VX-410, VX-414, VX-417, VX-420, VX-424, VX-427
The Motorola MH-66A4B shoulder mic is covered by a one year replacement warranty.