Maximize your pleasure tool with the Optimum Series Automatic Smart Pump, a sleek, durable penis pump sex toy for men, made for superior suction and performance enhancement. Increase endurance, improve stamina and amplify your rod with 3 unique enhancement exercise modes. The sleek smart pump has easy-touch controls and a quick air release button for customizable pumping. While the thick open-end sleeve and tight, nubbed chamber give you sinful stroking pleasure with or without the pump. Never settle for less when it comes to the size of your pleasure with the Optimum™ Series. The cylindrical pump and thick, durable sleeve are designed to create the perfect seal and powerful suction at the touch of a button. Once you've reached your peak pump, use the quick air release to decrease suction or release seal. When used regularly, this powerful pumper can increase stamina, enhance overall size and amplify sensation. Color : Black Materials : TPR Power Source USB Rechargeable (Included) Recharge the premium pump in 90 minutes with the provided USB charging cable to enjoy 60 minutes of high-speed stimulation or 80 minutes of low speed suction. Measurements 8" x 2.5" / 20.25cm x 6.25cm (Cylinder) 5.25" x 3" / 13.25cm x 7.5cm (Sleeve)