The hand-held heart detection module mainly used ECG as the raw material and surface electrodes to detect the heartbeat signals of potential difference from the heart on human skin. Features: A. Working voltage: 2.4V~5.0V. B. Low Direct Current Working Voltage and Electric Consumption C. Good anti-jamming capability. D. It can be matched with MCUs of various specifications. E. Stable output pulse balance, modular design, small size. F. Scope of application: It is suitable for hand-held heartbeat detection of sports equipment and electric treadmill. G. Compliance with ROHS Standard Package 2 x Heart Rate Detector Module 1 x Use Manual Note: This product is NOT a professional medical device and should not be used to diagnose or treat medical conditions.