The FITBIT FB405 Charge HR Wireless Tracker Activity Sleep in Small Black is a fitness activity tracker designed to monitor heart rate and distance during workouts. It comes with a wristband attachment for easy wearing and features wireless connectivity for uninterrupted tracking. With a battery life of up to 3 days and English language settings, this Fitbit Charge HR model is suitable for both men and women who engage in running and jogging activities. This activity tracker provides insights into your fitness progress, helping you stay motivated towards your fitness goals.