The 4G sleep monitor uses imported PVDF sensors and, based on the BCG monitoring principle, monitors vibration signals caused by body movements, chest expansion and contraction, and heart pumping. The sensors convert these signals into electrical signals, which are then processed through amplification, filtering, and algorithmic analysis to detect heart rate, breathing, body movement, snoring, and other data. These data are then uploaded to the user’s phone and server via the 4G cellular network.