During March 2025, qkdxorjs1002@naver.com developed a KR920 regional transmit power adjustment feature for the matteocrippa/firmware repository. This work involved modifying the radio interface configuration in C++ to increase the maximum transmit power from 0 to 23 dBm, ensuring compliance with KR920 regional regulations and potentially enhancing radio performance. The update addressed a TX power limitation bug that previously restricted output, enabling devices to operate within legal requirements. Drawing on expertise in embedded systems, firmware development, and radio frequency technologies, the developer delivered a focused, technically sound solution with depth in regulatory adaptation, though the scope was limited to a single feature.