For the most precise pumping possible, the Stallion Vacuum Pump System lets you monitor your pumping progress and view the amount of vacuum pressure. When you’ve reached your desired size, simply push the quick release valve to instantly relieve the pressure and you‘re ready to play! The handheld penis pump is the easy way to instantly enlarge your penis without any side negative side effects. Simply insert your penis into the vacuum cylinder tube, pump and watch your pleasure rod swell with power! An easy to grip pumper handle means you only need one hand to use this great tool, and the flexible hose won’t kink or crimp. You’l- also be able to see just how much bigger you‘re getting as you pump, with graduated measurements alone the side of the clear cylinder. Finally, a super soft jelly TPE donut ring around the base of the cylinder provides an airtight seal that feels great as well.