If base station of fast trackers alone is imported then it will be classified under HS 847180.

The base station for the Fitness Tracker converts electrical signals from the pedometer into data signals the computer can understand. The base station is powered by the computer, and charges the Tracker when it is physically docked with the base station. The base station is principally and solely used with a computer and meets Note 5c to Chapter 84 as a signal converting unit.

  Hence, it will be  classified under HS 847180.

Fitness Tracker, which records steps and motion , is classified under HS 903180 .

If the Fitness Tracker makes use of a three axis accelerometer to record not only a user’s steps, but motion as well. It uses this information to determine how many calories are being burned by the wearer. It uses the built-in accelerometer to track the user’s movement in three dimensions, and attempts to calculate the number of calories burned from this information. Then it is classified under  HS 903180 .