wow this thing has some suction on it!! Very well made piece of kit. Does exactly what you would expect it too and feels incredible while it does it. This is my first experience of a penis pump so I can’t really compare it to a manual one, but I can say this thing is very fun to play around with, just make sure you are hard when you start playing with it. I’ll explain later It’s automatic and recharges from a supplied magnetic adapter. No need to mess around with batteries. This also makes the unit waterproof. It looks and feels well made and using the buttons on top of the toy they worked everytime I pressed them without delay There are a number of features on this toy which I wasn’t expecting. One of them was the toys ability to suck and then release a bit of air before sucking again and releasing air again, over and over again. This imitates a similar feeling to masturbation. Which was an excellent feature to find. The toy isn’t the quietest I’ve ever used so if you have other people in the house they may wonder what you are messing around with behind your door All I would say is already be hard when using this toy. I tried it while soft to see how it felt and how I would grow inside the toy. During that the suction was so great that it sucked a ball in too and the unexpected pressure was pretty intense. Already being hard provides a better seal on the entrance of the toy stopping this. I’d recommend that people give this toy a go, it did offer a stronger feeling erection after using, my wife said she noticed a bit of difference. One tip; if you’re looking to increase to as much as possible. Use the toy and then apply a cock ring of some description straight after.