MFJ-301, EAR BUD, FOR SPK/MIC, 3.5MM, MONO PLUG

This new MFJ earphone earpiece is the perfect companion for your MFJ or other brand speaker microphone. You can continuously monitor receive audio and it lets you hear your radio in a loud, noisy environment. A comfortable foam earpiece fits securely and painlessly in your ear.
Its super lightweight. Fits in a 3.5mm jack on a speaker/mic.