Soft, power-packed stud flexes and bends for multi-directional positioning and 3 intense speeds. Dual motors (Over & Under) with easy push button control. Uses 2 AA not included. Materials: Phthalate-Free PVC (vibrator) ABS and ABS with PU Cote (cap) ABS with Silver Plating (decor). Dimensions: 5.5″ x 1.75″/14 cm x 4.5 cm (large shaft) 3.5″ x 1″/9 cm x 2.5 cm (small shaft).