StacksVerified U.S. regulatory reference

47 CFR §95.575

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Each FRS transmitter type must be designed such that the peak frequency deviation does not exceed 2.5 kHz, and the highest audio frequency contributing substantially to modulation must not exceed 3.125 kHz.