The Gyration Sensations Mini Gyrating Thumper from Cal Exotic Novelties features extreme vibrating and gyrating action. It is silky smooth and whisper quiet with 3 speeds. ABS plastic with polyurethane PU Cote massager, cap ABS plastic with Silver Plating decorative ring. 3.75 inches by 1.25 inches. Requires 2 AAA batteries, not included.