47 C.F.R. § 95.410 (CB Rule 10) How much power may I use?
Title 47 - Telecommunication
(a) Your CB station transmitter power output must not exceed the following values under any conditions:
AM (A3)—4 watts (carrier power) SSB—12 watts (peak envelope power) (b) If you need more information about the power rule, see the technical rules in subpart E of part 95. (c) Use of a transmitter which has carrier or peak envelope power in excess of that authorized voids your authority to operate the station.
Title 47: Telecommunication
PART 95—PERSONAL RADIO SERVICES
Subpart D—Citizens Band (CB) Radio Service
How To Operate a CB Station
§ 95.410 (CB Rule 10) How much power may I use?