Intensely powerful male stroker offers 3 speeds of thrusting and rotating action. Totally self-contained, wireless design with removable and replaceable sleeve for easy cleaning or independent use. Noduled chamber for explosive results. Comfortable grip. Sleeve is 3.25 in. by 2.75 in. Overall measurements are 9 in. by 2.75 in. Requires 4 AA batteries, not included.