The JayBird Reign Advanced Activity Tracker in White is designed for fitness enthusiasts, specifically catered towards running and jogging activities. With its large/x-large size, this tracker is perfect for those looking for a comfortable and secure fit during their workouts. The device offers up to 5 days of single charge life, water resistance, smart phone compatibility, and sleep tracking capabilities. The included armband attachment makes it convenient to wear during various activities, helping users stay motivated and on track with their fitness goals.