Clinical Research Directory

Inclusion Criteria: 1. Voluntarily participate in this clinical trial and sign informed consent; 2. Subjects must be willing and able to comply with the study steps; 3. Subjects aged 18 and above with wrist circumferences of 13.0-21.0 cm. Exclusion Criteria: 1. Subjects whose ECG during the screening period showed severe arrhythmias (atrial fibrillation, atrial flutter, ventricular flutter, ventricular fibrillation, ventricular tachycardia, junctional tachycardia, sinus arrest, pathological sinoatrial node syndrome, pacemaker rhythm); 2. Subjects with sickle cell disease; 3. Subjects who have undergone previous mastectomy or arm lymph node resection; 4. Subjects allergic to nylon, fluor rubber, or hydrogenated nitrile rubber (HNBR); 5. Subjects with wounds on the limbs at the measurement site or inflammation in the wrist; 6. Subjects undergoing intravenous infusion, blood transfusion, or other catheter insertion at the measurement site of the limb; 7. Those who ate, drank alcohol, smoked, or exercised vigorously within 30 minutes prior to the study; 8. Subjects who have participated in other clinical investigations that may affect this trial within the past 30 days; 9. Investigator believe that subjects should not participate in this clinical trial.