Negative pressure/suction helps to relax smooth muscle cells and swell the sponge.
After the sponge swells, arterial blood flows in to accelerate sponge congestion and increase the stiffness of the penis. The more the sponge swells, the stronger your penis will be and the longer it will be.
Air pressure will increase your sponge body, the vacuum pressure in the cylinder is low, and your sponge body will exercise in a physically safe way.
Universal design, suitable for everyone regardless of your size.
Led display & USB charging
Used to keep a healthy penis, even if you don't need a bigger penis use this to exercise your penis for a healthy manhood