Enjoy intense stroking action and wireless vibrations in the palm of your hand with this top of the line multi-function pump. This fully automated one-hand masturbator is made of durable plastic on the outside and a hygienically superior silicone sleeve for the inside. The sleeve is also nodulated to enhance pleasure, while the comfortable donut seal base ensures a tight and secure fit. Four LED lit buttons at the top of the cylinder control the speed and stroking action (three for each); and with nine combinations in total you're sure to find one that you like. The sleek waterproof design includes a detachable cylinder, for easy disassembly and cleaning, and a screw top lid for battery replacement. While some men say pumps increase size, others think they have no effect, and although pumps can extend length during use, there remains no conclusive evidence to support either.