Inside the Band
7 sensors. Always on.
Every sensor is optimized for continuous, clinical-grade measurement while you live your life.
Optical Heart Rate
4-LED photoplethysmography (PPG)
Continuous heart rate at millisecond precision. Powers HRV, recovery, and strain tracking.
ECG Electrodes
Single-lead electrocardiogram
Clinical-grade atrial fibrillation detection and irregular rhythm notifications.
Skin Temperature
Precision thermistor ±0.1°C
Tracks overnight skin temperature variation. Correlates with illness, cycle phase, and stress.
Accelerometer
3-axis, 100Hz sampling
Detects movement, activity type, step count, and overnight restlessness.
Pulse Oximeter
SpO₂ red/infrared LEDs
Blood oxygen saturation monitoring during sleep and activity.
Altimeter
Barometric pressure sensor
Elevation tracking for outdoor activities, hiking, and altitude effects on recovery.
Accessories
One device,
endless ways to wear it.
Every band uses the same device pod. Switch styles in seconds — from the gym to the boardroom.
Sport Flex
Lightweight and sweat-resistant for intense training.
Technical Specifications
Full specs.
5 days (Gen 1)
In the Box
Everything you need
from day one.
