The NIB Fitbit Charge 6 Fitness Tracker in black is a sleek and advanced activity tracker designed for unisex adults. Featuring a high-resolution display, this device provides accurate measurements for heart rate, time, calories, and distance. With a rechargeable battery that lasts up to 7 days and a variety of features such as Bluetooth connectivity, ECG heart rate monitoring, and a sleep tracker, the Fitbit Charge 6 is perfect for both indoor and outdoor activities like yoga and running. The stylish black band is made of durable materials like aluminum, plastic, and metal, making this fitness tracker a reliable and convenient tool for tracking your health and fitness goals.