Always-on wellness tracking Stress Management Score Daily readiness score & sleep profile (premium only) Blood oxygen (SpO2) Call, text & app notifications (Works when the phone is nearby) Up to 10-day battery (Varies with use and other factors) Includes 6-month Premium membership (New Premium members only. Premium included membership must be activated within 60 days of device activation. Valid payment method required. Cancel before your membership ends to avoid subscription fees. T&C apply.) Package Contents: Pack of 1 Device with 2 x Straps (Small & Large) and Charger