Powerful micro massager features high-rpm vibrations adjustable from mild to wild by a simple twist of the dial at the base. The massage head is sheathed in pure silicone and is attached to a flexible neck so you can hold it at any angle and still hit that spot just right. Batteries included. Length is 4 in., width 1 in. Requires 6 LR44 batteries, included. Sold as a bulk item.