Google Fit Bit Air

Design: Pop-out pebble pod with interchangeable bands and zero screen distractions (features a single status LED and haptic vibration).Health Sensors: 24/7 optical heart rate, SpO2 (blood oxygen), skin temperature variations, heart rate variability (HRV), and background AFib detection.Fitness Tracking: Steps, calories, Active Zone Minutes, auto-workout detection, and Daily Readiness/Cardio Load recovery scoring.Battery Life: Up to 7 days per charge, featuring fast charging that delivers a full day's use from a 5-minute charge.Durability: Water-resistant up to 50 meters (swim-proof).Ecosystem: Syncs with the Google Health App on both Android and iOS.