NEW GARMIN Vivofit 4 Black Activity Tracker, Size Large, NWOTs Garmin Vivofit 4 in sleek black. Features a digital display. Perfect for tracking activities. Package contains Vivofit 4 documentation and fitness tracker with black, silicone band. Easy-to-use fitness tracker features an always-on colorful display. Note: Two Garmin Vivofit 4 fitness trackers are available for individual purchase. Both are black, size large.