The Pearl Shine Vibrator Series consists of glossy rubber outer skin over a foam core. The 5" Bumpy Blue has a soft sensual feel and silky sensation with a 1.25" diameter. It features a tapered tip and stimulating nubs along the shaft of this multi-speed vibrator. One AA battery, not included, provides the vibrating action. It's waterproof so you can take it for baths, showers, or hot tubing excursions!