Read the listed motion
Separate direction, speed and pattern.
Find the component that moves
Flickering usually describes a tip moving back and forth. Rotation describes movement around a center. Vibration may refer to the tip, the housing or a separate motor. Look for a diagram or a manufacturer demonstration of the exact model.
Read mode counts in context
Three speeds and seven patterns can describe intensity and rhythm for the same motor. Check whether a listing specifies separate controls before assuming that the motions can be selected independently.
Distinguish a moving tip from suction
A model can combine both, but some only have a pressure opening. Use the photos and feature list to confirm that the model actually has a moving tip.