I was looking for a 12-volt pump to inflate my inflatable boat (4.5 meters). I decided to buy this product based on the reviews I read. The first test was done, and it didn't provide much air flow. I intentionally deflated one balloon just to see if it could give it some shape, but it didn't do anything else. Then, I tried it on a second scale that increases pressure. It inflated it, but it took a considerable amount of time to reach the required pressure, especially since I also used a pressure gauge. In conclusion, it is a cheap solution but not the best. Of course, with only 50 euros, we shouldn't expect much. From now on, it's a matter of time to see how reliable it is and how long it will last. Maybe for simple things like beach mattresses, life jackets, and other less demanding items, it could be a very good solution. But for an inflatable boat, no. It doesn't work definitively. If you want it for such use, it's a waste of money