The Chord LM–35 is a reasonably-priced Lavalier Tie Clip Microphone, compatible with Chord, Citronic or QTX VHF/UHF Wireless Beltpack Transmitters –  in addition to most laptop mic inputs, which means it can be used as both a recording option or video conferencing microphone.

If you have an old wireless system that you just can’t seem to source a replacement microphone for, and it has a threaded 3.5mm mono jack connection, then this may be exactly what you’re looking for.