The 5820 breathing version chip of 金年会6766 has excellent radio frequency performance and built-in high-performance MCU, which can effectively extract the weak signals of the human body such as breathing, chest expansion, and slight shaking. The advantage of the 5.8GHz FMCW presence detection scheme of 金年会6766 over high-frequency radar is that it has a larger coverage area and fewer human sensors can be deployed in the same space. At the same time, compared with the traditional 5.8G CW (continuous wave) presence detection scheme, it provides distance information, which can better avoid false trigger interference outside the range.