You can watch as your penis visibly grows in size as you use this pump with the one handed trigger for easy pumping. This penis pump has an extra-long vacuum tube that lets you see and measure how much your penis grows as you pump. The Hi-tech pump has a built-in, easy to read gauge. The One-hand Finger-grip Power-Pump will create the ideal vacuum space around your penis. The comfortable TPR sleeve is designed to have the right amount of give and stretch to aid in the creation and to help maintain the perfect vacuum as you pump. The style and design are as easy on the eyes as the pump is easy to use.