A rugged, half duplex accessory, typically worn on the lapel and incorporating dual extra-large PTT for ease of use with gloves. For added convenience, especially in very noisy environments, the headset accessories can be plugged directly into the RSM. When used with a headset, audio from the RSM speaker can be enabled/ disabled by means of the rotary switch located at the NEXUS jack plug entry. Audio to the headset is provided in both cases. This allows nearby colleagues to hear both sides of a conversation.