McKay 4ISSM Speaker Microphone - The 4ISSM Speaker microphone is a large sized heavy duty speaker mic that has an auxiliary NATO Headset jack fitted to the top. The Large 50mm diameter red PTT button allows ease of use even when wearing gloves. The unit is fully sealed fro dust and water ingress.

NB: You MUST choose a Connector from the "Available Options" list.

If you are not sure what connector fits your radio, check the Radio Connector Parts List to find your radio and identify your  correct connector.