What is the function of the side sensor on Watch 2?

The side sensor is a patent-pending clinical-grade fingertip sensor, usually found in medical oximeter devices. This side sensor is at the core of the high precision in Watch 2. It delivers non-invasive and safe measurements of peripheral oxygen saturation (SpO2), APG (Vascular Aging measurement), Blood Pressure and heightened accuracy to other measurements as well.

Please note:

  • Your index finger must be clean and dry, otherwise it may affect the accuracy of the measurement.
  • The APG service is only available if you have an active monthly subscription.

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