Lefun Smart Ring Smart Heart Ring Monitor Heart Rate Fitness Tracker Size 6 Black

New in box, size 6, Lefun smart rings track heart rate, blood oxygen, and blood pressure automatically every 30 minutes, ideal for daily wellness monitoring. They feature sleep tracking with deep/light sleep analysis and support eight sports modes for workouts. With a slim 2mm profile, 3-5 day battery life, and compatibility with ios and Android, these rings offer discreet health tracking without subscriptions. C42025