The water-based power of this pump is for users measuring between 5 and 7 inches when erect. Once filled with warm water, the pump seals against the body. For best results, start with 3 five-minute sessions per use (1-3 months).
I was skeptical about the whole water thing, but the seal holds way better than I expected once it's full. Sticking to the 3 five-minute sessions has been easy to fit in, and I've already noticed a difference after a couple weeks.
Filling it with warm water before sealing makes the whole thing way more comfortable than I expected. I do the three five-minute sessions and it's become a easy part of my evening routine.
I was skeptical about the seal holding, but once it's filled with warm water it locks on tight and stays put. Doing the three five-minute sessions feels easy to fit into my routine, and I've noticed a real difference after a few weeks.