OPC-499 : ICOM Headset Adapter Cable $ 39.95 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart OPC-499 : ICOM Headset Adapter Cable. Designed for ICOM handheld radios such as IC-A24, IC-A6, IC-A23, IC-A5, IC-A14, IC-A14S, IC-A22, IC-A3 etc.