The cylindrical pump and thick ring 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. Recharge the premium pump in 2 hours with the provided USB charging cable to enjoy 3 hours of passionate suction. To track progress, use the incremental measurement marks on the cylinder shaft.