This pump is very strong. Carefully read the instructions, especially a beginner. I'm a veteran pumper, but this one has done an exceptional job at breaking a plateu at was at. I'm very happy with it. Battery life has been exceptional.
....has a critical design flaw re the bottom edge/opening. There is not a comfy, cushy band -as pictured. It is a separate thin piece, that often comes off during use & has an oddly very narrow (2cm max.) opening, making it almost impossible to utilize. One must grind the cushion-less tube very hard into the pubes, like a cookie-cutter, to achieve a seal & suction = o u c h ! :/
I had three problems with this device. First, it took too long to enlarge my penis. Second, when I removed my penis, the enlargement did not last. Third, the instructions are complicated and hard to follow.
Works quick and like a charm. Definitely satisfied.
I love ❤️ it . it does not put too much pressure on my testicle. I highly recommend this product