This is a penis pump developer, which thanks to the pressure of the air introduced with its handy and efficient pump, will make erections harder and more imposing. Thanks also to the adjustable vibration, in addition to training, will you be able to exercise? try an extra stimulation ?. The high quality materials, free of phthalates, make the pump transparent, so that you can view the progress of the penis. For a correct use of the product we recommend the association with a lubricant. How to use it: 1. insert the penis into the pump 2. operate the pump as long as you want 3. after a few minutes, let the air out of the pump 4. wait a few minutes 5. pump again 2-3 times per session 6 repeat the procedure twice a week.