provides constant, always-on pulse oximeter readings to your iOS device and Apple Watch. SPO2 readings are obtained using a thin sensor pad worn near the ear or on the forehead and then broadcast wirelessly to your Apple phone, tablet, and watch using the Aithre Connect app. It's like an engine monitor for your body! Now available as part of an Aerox bundle when you purchase any Aerox portable oxygen system! JUST $99 when bundled with any AEROX Portable!