Soloflesh responds to your movements with dynamic responsive motion as can be seen in our demo video. Whatever movement you do to it, it does back to you, varying withthe intensity of your motions. Since it moves in response to motions from your body or hands, there are no electrical power requirements and operation is silent. The warmth of the water can be felt not only on the inside, but on the outside as well. Try it "girl on top" and feel it moving in your hands. Every time you come in contact with the exterior you will feel the lifelike warmth.