Why is the battery operated pump recommended?
The battery operated pump provides a more constant steady flow of vacuum pressure & thus a more effective pumping session. Fresh airflow is continually being created in the cylinder. The fresh airflow stimulates circulation of continual fresh blood flow which is critical for maximum engorgement of the penis. You can keep the cylinder on the penis the entire pumping session instead of having to take off the cylinder & massaging fresh blood flow into the penis as you have to do with a manual pump. We HIGHLY recommend the battery operated pump. This pump also works great with the Penis.
