What sensors does the Watch use for health tracking?

Vyvo BioSense Watch is equipped with sensors for ECG, BIA, SpO2, BP, temperature, humidity, and air quality:

1. BP, SpO2, APG fingertip sensor.
2. Indoor and Outdoor Air Quality Sensors.
3. Temperature & Humidity sensor.
4. Skin temperature, continuos AFIB, continuos HR, SPO2 sensors. 
5. The device is also equipped with ECG & BIA frontal and backside electrodes.