Though the nature and extent of its anomalous properties remain uncertain, SCP-4666 appears capable of instantaneous or near-instantaneous travel to any location north of 40°N latitude, and possibly to any location on Earth.

SCP-4666 activity occurs exclusively within a period of 12 consecutive nights every year, from the night of December 21-22 to the night of January 1-2; this period is known as SCP-4666’s “active phase”.