Black Fitbit Charge 6 Fitness Tracker model GA05183NA. Introducing the Fitbit Charge 6 Fitness Tracker. This versatile activity tracker is perfect for individuals who want to monitor their fitness activities. It features a rechargeable battery that allows for up to 7 days of usage, and is compatible with Bluetooth and GPS sensors. The Fitbit Charge 6 provides measurements for heart rate, time, distance traveled, and calories burned. It also includes features such as a wristband, pedometer, exercise log, smartphone compatibility, calorie monitor, average heart rate, and sleep tracker. This activity tracker is made from a combination of aluminum, plastic, and metal materials, and is waterproof for use during yoga and running & jogging activities. The Fitbit Charge 6 is available in English, Italian, French, Spanish, and German languages.