ADA-25M35F: 2.5 to 3.5mm Audio Adapter
https://m.media-amazon.com/images/I/21WDda8iLgL._AC_.jpg
https://m.media-amazon.com/images/I/21WDda8iLgL._AC_US40_.jpg
MAIN
It Works as a Mono Adapter
https://www.amazon.com/vdp/4edba3ee4dba48f49802970648c87fda?ref=dp_vse_rvc_0
AHIYAQR7D4OL7G5OJQTXXKJAWE4Q
{"Date First Available": "January 22, 2008"}