The Under Armour Healthbox Connected Fitness Tracker System in black is a high-quality activity tracker designed for unisex adults. It provides measurements for heart rate and calories, making it ideal for monitoring your fitness goals. With features like Bluetooth connectivity, calorie monitoring, and water resistance, it is perfect for activities such as gym training, yoga, and running. The wrist and chest strap design allows for comfortable and accurate tracking, while the sealed packaging ensures the device is brand new and ready to use.