The Fitbit Blaze Smart Fitness Watch Classic FB502 is a versatile activity tracker suitable for indoor and outdoor use. It comes with a charger and seven interchangeable bands in multicolor. The device is compatible with iOS and Android operating systems and provides measurements for heart rate and distance. It features Bluetooth connectivity, an alarm, an altimeter, and sensors for heart rate and accelerometer. The watch is designed for unisex adults and can be used for various sports and activities such as gym training, crossfit, swimming, pilates, running, and jogging.