Size range: 14 (Size 14 = largest)

Weight: ~2–3 g

Thickness: ~2 mm

Material: Aerospace-grade titanium alloy + medical-grade epoxy resin

Battery life: ~10–12 days (up to ~150 days with charging case)

Water resistance: 100 m

Sensors / tracking:

Heart rate, HRV

SpO₂ (blood oxygen)

Skin temperature

Respiratory rate

Sleep tracking: stages + sleep apnea monitoring

Other tracking: activity, stress, menstrual cycle

Subscription: none

Compatibility: iOS & Android