The Vibrating Expandable Anal Thriller can be enjoyed equally by both men and women. Experience the thrill of anal stimulation and vibration. Pump up the Anal Thriller to over three times it's size with the squeeze of a bulb. It's measurements are 5 inches long with a 1 inch base, and has a circumference of 4 inch inches. Then with just the press of a button on the EZ release valve, gradually decrease it's size at the point of climax for ultimate pleasure.