The Optimum Series Automatic Smart Pump is a sleek, durable penis pump sex toy for men designed for superior suction and performance enhancement. Increase your endurance, stamina, and rod amplitude with three distinct enhancement exercise modes. For customizable pumping, the sleek smart pump features easy-to-use controls and a quick air release button. With or without the pump, the thick open-end sleeve and tight, nubbed chamber provide sinful stroking pleasure. When it comes to the size of your pleasure, the Optimum Series will never let you down.