A disclosure of this specification provides a device configured to operate in a wireless system and to support PC2 (Power Class 2), the device comprising: a transceiver configured with intra-band non-contiguous CA, wherein the transceiver is equipped with dual power amplifier, wherein the intra-band non-contiguous CA is configured to use a first CC(component carrier) and a second CC; and a processor operably connectable to the transceiver, wherein the processer is configured to: determine maximum transmission power, based on an MPR(Maximum Power Reduction), transmit uplink signal using the intra-band non-contiguous CA, based on maximum the transmission power.