Power Stud Traditional designs with a contemporary flair. Body safe. push-button 3-speed controller. 100% waterproof. 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). Soft and flexible vibrators. 3-speed. Power packed. Push button control. Phthalate-Free PVC (vibrator) ABS/ABS with PU Cote (cap) ABS with Silver Plating (dcor). 2 AA batteries.