The Vivosmart 4 comes with a black band and a black bulk. The special thing about Vivosmart 4 is it has an energy monitor that tells you when you should be resting and when you should be burning extra energy. This allows you to burn carbs without over exerting yourself, making the Vivosmart 4 the perfect asset for achieving your fitness goal.
Eric and James, the founders of Fitbit utilized modern technology to create a device that helps people track their health and active. The Fitbit was made to empower people to invest in their health and live a more active lifestyle.