Fitbit Air is a genuine 2026 Google/Fitbit product, with up to 7 days of battery, heart-rate tracking, SpO₂, HRV, sleep tracking, readiness/cardio-load metrics, and Google Health app integration. Google Fitbit Air is a lightweight, discreet screenless fitness & health tracker, designed for comfortable 24/7 wear — including during sleep and workouts. Key features: * 24/7 heart-rate tracking * Blood oxygen (SpO₂) monitoring * Sleep Score & sleep stages * Heart-rate variability (HRV) * Activity, calories & Active Zone Minutes * Cardio Load & Readiness Score * Skin-temperature variation * Up to 7 days of battery life * Water resistant up to 50 m * Works with the Google Health app * Screenless design — no notifications or distractions * Extremely lightweight — about 12 g including the band