The vampire with this equipment is immune to frenzy cards (including Brujah Frenzy, Drawing out the Beast, Frenzy, Rotschreck and Terror Frenzy).
Clarifications and Rulings
Immunity to the frenzy card at the time it is played is the key. Losing the use of the Finger won't make the vampire vulnerable to a previously-played Frenzy card, and gaining it won't suddenly render him immune to a previously-played Frenzy card. [LSJ 20040210]