AnerosThis fantastic prostate stimulator is made by Aneros and is made from high quality medical grade silicone that has a satin finish. It measures four inches long and the width is one and a quarter inches. It comes with a stainless steel vibrator that can be removed. The vibrator has nine different vibration modes. Three different vibration patterns with three speeds for each one. Vibration requires one AAA battery and will supply around 6 hours of vibration. It is ergonomically designed for maximum prostate stimulation.