Commander Expert Vibrating Butt Plug Black from Nasstoys of New York. Features: powerful vibration. Soft for easy entry. Expands after entry. Push button suction cup. Removable bullet vibrator. Waterproof vibrations. Phthalates free RoHS compliant materials butt plug 100% silicone, bullet vibrator ABS plastic. Size length 4.5 inches, width 2.5 inches, circumference 5.5 inches. Bullet vibrator requires 1 AAA battery, not included.