The Fitbit Inspire 3 Tracker in Black Midnight Zen includes small and large bands for a comfortable fit on the wrist. This activity tracker offers Bluetooth connectivity, heart rate monitoring, and SpO2 sensor capabilities. With a battery life of up to 10 days, it provides measurements in both decimal and imperial systems, making it suitable for indoor and outdoor activities. The device is compatible with iOS and Android operating systems, and includes features such as a variety of languages for the display, a 1-year manufacturer warranty, and a sleek silicone and plastic construction. Ideal for gym training and running, the Fitbit Inspire 3 is a reliable tool for fitness enthusiasts.