This 11" man-sized probe has extra length and girth. The rotating tip is soft and pliable. Just below the head, a sheathed section is filled with two rows of heavy duty and non-jamming sleek metal balls that rotate rapidly to enhance your stimulation and pleasure. This unit does not vibrate in the traditional sense, but instead uniquely tantilizes with the movement of its circling head and beaded shaft. Has easy to use push button control with dual speeds and LED indicator. Unit takes 3 AA batteries, not included.