What specific observational feature allows Pulsars, which are rapidly spinning Neutron Stars, to be detected as regular pulses?

Beams of radiation sweeping past Earth from the magnetic poles

Neutron stars often possess incredibly strong magnetic fields, and their rapid rotation causes these fields to sweep beams of intense radiation across space. These rapidly spinning, highly magnetized objects are identified as pulsars. If the orientation of these magnetic poles, from which the beams emanate, is such that the radiation sweeps across the vantage point of Earth, astronomers detect a highly regular, precisely timed succession of radiation signals, typically in the form of radio waves or other electromagnetic radiation. This lighthouse-like effect allows for precise measurement of the object's spin period.