Garmin VivoSmart 4 Activity Tracker - Black Size S/M HR Monitor SEE PICS FOR CONDITION SLIGHTLY USED ON AN OFF FOR MAYBE A MONTH, JUS DIDNT LIKE THE STYLE, HOWEVER WORKED GREAT. Garmin Vivosmart 4 Fitness Tracker With PulseOx Sensor is a compact, lightweight watch that rests on your wrist to track your sleep, blood oxygen content, steps taken, heart rate, and more.  A revolutionary daily fitness tracker, this device gets you on track to better health and gives you detailed information about your sleep and health