Penis pump is a cylidner which is fitter around the your penis and a device which creates suction, it can be motorized or manually used. The blood is drawn into the penis which helps it to become bigger in side and keep erection longer.
You have to be realyl careful with it since it can do damage if the pressure is increased to a limit. With sizegenetics system you do not have to worry about these things and it’s the safest alternative to all pills and pumps that’s available on the web today, so be sure to do your research and go with the most guaranteed option which in my mind if sizegenetics