About this item Always-on wellness tracking;Stress Management Score; Daily readiness score & sleep profile (premium only);Blood oxygen (SpO2) Call, text & app notifications (Works when 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 membership ends to avoid subscription fees. T&C apply.) Package Contents: Pack of 1 Device with 2 x Straps (Small & Large) and Charger Connectivity Technology: Wifi; Clasp Type: Tang Buckle; Case Material Type: Resin; Human Interface Input: Touch Screenbuttons; Band Material Type: Silicone