Use the pump. Place the cylinder so that you seal it well around your vaginal area. High pressure is required to achieve a good seal. We also recommend a good water-based lube to successfully seal the pump. Place the handy cylinder over your favorite erogenous zone and squeeze the hand pump to draw blood to that area. You'll feel the suction as your clitoris briefly becomes larger and more sensitive. You can quickly release the pressure in the cylinder by pressing the bleed valve on the pump. You can also remove the cylinder from the pump, thanks to a simple locking system, so that your clitoris remains sucked in the cylinder. The set comes with 1 pussy cup, 1 hose and 1 hand pump. Compatible with all types of lubricants.Super soft and elastic silicone pump sleeve Designed to optimize your comfort It effectively creates an airtight vacuum in the inflated penis cylinders The diameter is 7cm Splashproof and phthalate free.