PRASEQ Headphone Splitter | Heil Ham Radio | Amateur Radio
Amazon.com: Devinal 3.5mm to Mini XLR calbe, 1/8 inch Stereo to 3 Pin Mini XLR Male Cord Adapter Connector, Balanced Male Mini-XLR to Mini Jack(3.5mm) TRS for Pro Lapel Mic 12 inch :
Phone connector (audio) - Wikipedia
How to Make Your Own Aux Cable: 7 Steps (with Pictures) - wikiHow