SpO2 System Accuracy Testing With Different Sensors

Inclusion Criteria: * Ability to provide written informed consent or have a legally authorized representative provide written informed consent * Subjects who are 18-55 years of age * Subjects must be willing and able to comply with study procedures * HbCO\<3% (for smokers only) Exclusion Criteria: * Subject or a legally authorized representative is unable to provide written inform consent. * Subjects that are considered morbidly obese (defined as BMI \> 39.5), * Subjects with injuries, deformities or abnormalities that may prevent proper application of the device under test, * Smokers with COHb levels \>3% or subjects who have smoked within two (2) days. Subjects will be screened for COHb levels of \>3% with a Masimo Radical 7 (Rainbow). * Subjects with known respiratory conditions (uncontrolled asthma, head cold, flu, pneumonia / bronchitis, respiratory distress / respiratory or lung surgery, emphysema, COPD, lung disease), * Subjects with known heart or cardiovascular conditions, * Female subjects that are actively trying to get pregnant or are pregnant, * Subjects taking blood thinners or medications with aspirin or other antiplatelet medication in them (applies only to arterial draw study), * Subjects with Systolic blood pressure \>140mmHg, * Subjects with Diastolic blood pressure \>100mmHg, * Subjects with heart rhythms other than a normal sinus rhythm or with respiratory sinus arrhythmia