USED OURA Horizon 3 Smart Ring GOLD Finish. Includes Charger. SIZE 9. UNISEX. Factory Reset. Current charge last 2-3 days. Moderate surface scratches throughout from normal wear. No peeling. Track your sleep, workouts, heart and more. Water resistant up to 100m 328 ft. (Works by Bluetooth with app membership is 69.99 annual or 5.99 month before tax).