Delay ring, before and after use to pay attention to cleanliness and hygiene, is the right size ring, directly over the coronal groove of the penis and the root of the penis, thus creating tension on the penis, reducing the rate of venous blood return, but does not prevent the pumping of arterial blood, thus increasing the blood in the penis, the cavernous muscles constantly filled with blood. The fibers of the cavernous muscles of the penis can be elongated and enlarged, thus playing a role in extending the duration of sex. The delay ring should not be used for a long time, otherwise it will produce dependence.