EN 300 328 CE radio certification with power limit
"4.3.1.2.3 Limit
The maximum RF output power for adaptive Frequency Hopping equipment shall be equal to or less than 20 dBm.
The maximum RF output power for non-adaptive Frequency Hopping equipment shall be declared by the supplier. See
clause 5.3.1 m). The maximum RF output power for this equipment shall be equal to or less than the value declared by
the supplier. This declared value shall be equal to or less than 20 dBm.
This limit shall apply for any combination of power level and intended antenna assembly. "