abcGOODefg Waterproof Rainproof Shoulder Remote Handheld Speaker Mic for 2 Pin ICom Cobra Maxon Yaesu Vertex Radio IC-F3 IC-F3S IC-F3GS IC-F10 IC-F11 IC-F15 IC-F21 IC-F1610N IC-F22S etc. Built-in PTT and microphone is very handy Talk and listen without ever holding your radio. Do NOT work with Alinco or Midland Radio. Radio can be placed anywhere with Microphone/Speaker conveniently located - wear it on your collar to keep the volume near your ear Push-to-talk button and microphone are located on the accessory for quick and easy use. Great for noisy AND quiet areas because speaker is located right near user's ear.