Icom Icf121 Manual |best| Page

Since ICOM no longer produces the ICF-121, official sources are limited, but users can still track down the manual via:

The primary difference is the display. The IC-F121 model typically features a full numeric display and keypad for channel selection and operation. The IC-F121S is a "simplified" or "S" version, which often has an 8-channel capacity and no numeric display or keypad, offering more basic operation. icom icf121 manual

Edit frequencies, tone settings (CTCSS/DTCS), scan lists, and assign functions to the P0–P3 keys. Since ICOM no longer produces the ICF-121, official

Use the supplied mounting bracket and self-tapping screws to fix the radio to the dashboard or console. official sources are limited