Optimum Power Ultimate Head Exciter is an intensely powerful male stroker. 3 speeds of thrusting and rotating action. Easy to use controller with LED light. Totally self contained, wireless design. Removable and replaceable sleeve for easy cleaning or independent use.Noduled chamber for explosive results. Comfortable grip. Safe and pure for body and pleasure made using phthalate free materials ABS plastic stroker, Thermoplastic Rubber TPR sleeve. 3.25 inches by 2.75 inches sleeve. 9 inches by 2.75 inches overall. Stroker requires 4 AA batteries, not included. Bulk weight 12.3 ounces.