For use only with the Control Unit 30352 and lap counter 30355.

Your current race position will always be under control with the new Position Tower.

Features:
LED-display of latest race position
Information on each leading car�s laps

Contents:
* Position Tower
* Adapter Unit (track piece shown)

Further instruction and description (youtube)..Very good, produced by Carrera.
The PDF link below explains all the new Carrera digital track items. You must have the 30352 control unit to operate the other items.
Feature Guide (pdf)