Star Wars The Black Series Imperial Stormtrooper Electronic Voice Changer Helmet, Collector Item, Ages 8 and up. Collector-grade quality, part of the Black Series collection. Realistic detail and movie-accurate reproduction. Electronically change your voice to sound like an Imperial Stormtrooper. Includes helmet and instructions. X3 1.5v AAA ALKALINE BATTERIES REQUIRED. Product Dimensions: 10.75 x 12.52 x 8.5 inches. Item Weight: 2.51 pounds.