When motion was detected in front of the Motion Tracker, a circle would appear on its screen, indicating where the motion was detected. If motion was detected on the left, right or back of the Tracker, a crescent-like indicator would illuminate, indicating on which side of the Tracker the motion was detected. The Tracker was prone to interference in enclosed spaces; in such situations, its screen tended to flicker, making it harder to determine the exact location of any moving targets. However, the Tracker's fundamental functions were unaffected and continued to work normally.