GH3220 is a health sensor that integrates single-lead ECG and multichannel PPG sensing circuits, capable of monitoring health indicators like heart rate (HR), heart rate variability (HRV), peripheral capillary oxygen saturation (SpO2) and pulse wave translation time (PWTT). It has the distinct feature of ultra-low power consumption and extremely high precision, and is applicable to the smart devices like high-end smart watches and wristbands.