Radio Frequency Guide

Most off-the-shelf radios use Family Radio Service (FRS). You can tune your programmable UHF radio to the matching frequencies below to use the two types of radios together:

MURS Channels

MURS (Multi User Radio Service) is a set of VHF channels mostly used in business radio communication. The FCC has kept five MURS frequencies license-free and open for public use since 2000. Handheld radios broadcasting on MURS frequencies can experience a range of two miles to eight miles depending on terrain and obstructions, while MURS Base Stations can reach up to 20 miles.

CTCSS Privacy Codes

Often these will be called "privacy codes" or "subchannels" on FRS radios.
Set both CTCS-R (receiving code) and CTCS-T (transmitting code) to the matching frequencies below on your programmable radio to communicate with FRS radios using subchannels:

DCS Privacy Codes

Some FRS radios use DCS privacy codes instead of or in addition to CTCSS.
Set both DCS-R (receiving code) and DCS-T (transmitting code) to the matching frequencies below on your programmable radio to communicate with FRS radios using subchannels:

Reference: https://www.k0tfu.org/reference/frs-gmrs-privacy-codes-demystified.html