Please upload two clear photos: one of your LEFT wrist and one of your RIGHT wrist.
For each photo:
Show the skin on the top side of your wrist where the study watch or band sensor will rest. Use bright, even lighting and make sure the skin is in focus.
The study team will review the photos to assess visible hair coverage and whether tattoos, scars, or wounds overlap the sensor placement area.
Please upload each photo in its corresponding LEFT or RIGHT wrist field. Final eligibility will be determined by the study team using the study's eligibility criteria.