It sucks, it strokes, it vibrates. If it did any more, you'd need a license to operate it. The Robo Suck 2 is the first masturbator that truly strokes and vibrates at the same time! A nubby sleeve enhances the feel of multi-speed vibration. And you adjust exactly where the strokes hit. The result is a volcanic simultaneous orgasm, as only vibrating and stroking can deliver! Pump uses 4 C batteries that are not included. Pump stands 12 inches with an insertable depth of 7 inches with a base circumference of 10 inches.