ICOM SP29 Earhook type earphone with 3.5mm plug
Free
Earhook earphone style, with a 3.5 mm plug. Usable with either HM-222 or AD-135.
This is great for the ICOM IC-Sat 100 Radio
https://www.satmodo.com/product/icoms-ic-sat100-land-mobile-radio-lmr/