Klein Electronics' Veteran Military Grade Speaker/Microphone features an emergency PTT button on the side of the unit. Additionally, this fully insulated unit includes a 3.5mm audio port, to add the optional Scorpion or Shadow listen-only earpiece, IP-54 all-weather rugged 4.5mm cabling, volume control, and a rubber coated grill. The unit also comes with a swivel clothing clip and a heavy-duty coil cord.