It is a great concept, a small bi-polar electrode that fits in the anus with one pole inside and the other outside. It affords a wide range of sensations, much different that the usual butt plug electrode that has conductors on the sides of the plug. This one is just a bit to micro. It would be nice to have this in a larger version, say two balls 1.5 inch diameter with 3/8 inch insulation between them. That would stay in place more readily.