Inclusion Criteria:  Adults ≥ 19 years of age (minimum 30% male/female)  Wrist circumference between 13.5cm - 23cm (5.3 in. - 9.1in.)  At least 20% of total participants, greater than 20.6cm At least 20% of total participants, between 18.3cm & 20.6cm At least 20% of total participants, between 15.9cm & 18.3cm At least 20% of total participants, less than 15.9cm At least 10% of total participants, greater than 21.8cm At least 10% of total participants, less than 14.7cm Willing to volunteer to participate and to sign the study specific informed consent form  Exclusion Criteria:  Wrist circumference less than 13.5cm (5.3 in.) or greater than 23cm (9.1 in) Hand or body tremors Canadian Cardiovascular Society (CCS) grade III or IV angina pectoris (chest pain) Unexplained shortness of breath at rest History of seizures (except childhood febrile seizures) Epilepsy History of unexplained syncope (fainting) Pregnant A musculoskeletal disorder that prevents a non-invasive device to be inflated/deflated on the arm Unwilling to volunteer to participate and to sign the study specific informed consent form