• Tracks heart rate, blood oxygen levels, and sleep patterns. • Always-On Retina display is brighter outdoors for better visibility. • S6 SiP chip delivers up to 20% faster performance than Series 5. • Measures workouts like running, swimming, yoga, cycling, and high-intensity interval training. • Aluminum case is lightweight and durable. • Brand new condition. • Rubber band is comfortable for all-day wear. • 32GB storage for music, podcasts, and apps.