WatchPAT^® is an innovative Home Sleep Apnea Device (HSAT) that utilizes the peripheral arterial signal (PAT^®) for Sleep Apnea diagnosis.  It measures up to 7 channels (PAT^® signal, heart rate, oximetry, actigraphy, body position, snoring, and chest motion) via three points of contact. Within one minute post-study, the raw data is downloaded and auto-scored identifying all types of sleep apnea events. WatchPAT^® home sleep apnea test provides AHI, AHIc, RDI, and ODI based upon True Sleep Time and Sleep Staging. The WatchPAT^® Home Sleep Test (HST) is clinically validated with an 89% correlation to PSG¹. The PAT signal was included in the 2017 AASM Clinical Practice Guidelines as technically adequate.