MightySat Rx uses Masimo SET pulse co-oximetry technology, widely validated in clinical research for accuracy during motion and low-perfusion conditions. It measures pleth variability index (PVi) for non-invasive fluid responsiveness assessment, making it valuable for both clinical and sports performance monitoring. The device pairs with the free Masimo Professional Health iOS/Android app for trend graphs and Bluetooth data export. FDA cleared and CE marked, it is suitable for remote patient monitoring programmes. Long battery life of 16 hours continuous operation supports around-the-clock SpO2 monitoring.