I am a ship engineer, so my opinion carries weight because I am knowledgeable about machinery and device components. Listen to me carefully. I bought the pump and tested it by deflating the front tire, as it has more weight since there is an engine. It inflated it and restored it to the correct pressure in 15 minutes. Now, as for the device, I didn't find anything negative except for the slightly annoying noise it makes, which is normal since it has a small compressor inside the device that pressurizes the air. The rubber is durable and of good quality, which we place on our tire. Also, the valve easily attaches and is sturdy, there is no air leakage from the valve. The power cable that is included easily connects to the car's adapter. It is better if we want, we can operate the car's engine first, as it provides more power to the pump and prevents the battery from draining, especially if it is old. I write this as a precaution, although I don't believe that in the 15 minutes it worked, it could drain the battery, as it requires a low voltage. The installation of the components, power cable, and elastic hose with the valve fit perfectly on the device without difficulty. Also, there are three accessories to inflate balls, mattresses, etc. Be careful not to lose them. The overall appearance of the device is positive. I put it back in its box and it is in the trunk of my car for emergencies whenever needed. I found it for 14 euros, but there is also the same one for 35 euros. Prefer a reliable online store that has credibility. It has a 6-month warranty. I would like to add that during the time the pump was running, it did not heat up at all, it remained cool. PLEASE, when you receive it from the store, open it and test it at that moment because I didn't do it and when I got home and tested it, it didn't work, there was no power. So, there was an unfortunate incident without the store being at fault, as everything was sealed. This kind of problem sometimes occurs with some pumps, but it was resolved as they replaced it the same day and it worked perfectly. Friendly regards, Alexandros