Laboratory-grade sensing, worn on one finger
Infrared PPG array
Dual-wavelength photoplethysmography samples your pulse from the palm-side arteries — designed for accurate heart-rate and blood oxygen measurements.
3-axis accelerometer
Detects movement, steps and micro-restlessness to separate genuine deep sleep from lying still.
Skin temperature probe
Tracks nightly variation from your personal baseline to help identify changes in recovery and wellness.
SpO₂ sensing
Overnight blood oxygen sensing helps identify breathing disturbances and changes in your nightly patterns.