This study demonstrates that BiTeBr exhibits a large second-order nonlinear response that persists up to 350 K, making it suitable for room-temperature radio frequency (RF) rectification. The nonlinear response is attributed to skew scattering, which is driven by the large Rashba spin-orbit coupling in BiTeBr. The sign of the nonlinear response can be electrically switched by tuning the Fermi energy. The BiTeBr rectifier can rectify radiation in the frequency range of 0.2 to 6 GHz at room temperature, even at extremely low power levels of -15 dBm, without the need for external biasing. The study highlights that materials with large Rashba spin-orbit coupling can exhibit nonlinear responses at room temperature, making them promising candidates for harvesting high-frequency and low-power ambient electromagnetic energy. The research also shows that BiTeBr can rectify wireless RF signals over 0.2 to 6 GHz and works at low power RF signals at -15 dBm under zero external bias. The findings have significant implications for the utilization of Rashba-type nonlinear responses in high-frequency, low-power RF rectification applications, and pave the way for advancements in wireless communication technologies. The study also demonstrates that BiTeBr can detect and rectify low-power wireless RF signals at high frequencies, positioning it as a promising candidate for low-power ambient electromagnetic energy harvesting.This study demonstrates that BiTeBr exhibits a large second-order nonlinear response that persists up to 350 K, making it suitable for room-temperature radio frequency (RF) rectification. The nonlinear response is attributed to skew scattering, which is driven by the large Rashba spin-orbit coupling in BiTeBr. The sign of the nonlinear response can be electrically switched by tuning the Fermi energy. The BiTeBr rectifier can rectify radiation in the frequency range of 0.2 to 6 GHz at room temperature, even at extremely low power levels of -15 dBm, without the need for external biasing. The study highlights that materials with large Rashba spin-orbit coupling can exhibit nonlinear responses at room temperature, making them promising candidates for harvesting high-frequency and low-power ambient electromagnetic energy. The research also shows that BiTeBr can rectify wireless RF signals over 0.2 to 6 GHz and works at low power RF signals at -15 dBm under zero external bias. The findings have significant implications for the utilization of Rashba-type nonlinear responses in high-frequency, low-power RF rectification applications, and pave the way for advancements in wireless communication technologies. The study also demonstrates that BiTeBr can detect and rectify low-power wireless RF signals at high frequencies, positioning it as a promising candidate for low-power ambient electromagnetic energy harvesting.