The pump works, once you do some tests. It resembles variations of other models that are sold at similar or even cheaper prices. I used it once to inflate car tires that had dropped to 1.8 bar. It went up to 2.3 bar and automatically stopped the inflation. It slightly heated up at the bottom. Now, onto the concerning part. It is a Chinese product, brand "SUITU," without CE marking on the machine, the manual, or the box. The very small instruction manual is in broken English (which also indicates the quality) and Chinese. 120W, 35 L/min. The manual recommends letting the pump cool down for 10 minutes after inflating a tire. I assume when you inflate from 0, because in my case, it had no problem doing 4 one after the other. The packaging also includes 3 adapters with different nozzles for inflating other valves (e.g., one must be for balls). In a few words: It does its job, but I wouldn't vouch for the quality or durability, especially due to the complete lack of CE certification (I wonder how it is being sold in the European market). In other words, when I first connected it to the cigarette lighter, I crossed myself, fearing it might blow a fuse. That's why I can't give it more than 3 stars, as it doesn't allow you to rest easy in terms of quality. And the fact that it is sold without mentioning the brand, while there is a brand on the box, makes you wonder about the quality.