I have several tires that keep deflating despite having excellent tread. After the mechanic checked them for leaks, I was told they couldn't find anything wrong or a reason why my tires should be deflated. Aside from buying new tires, the only option was to continue to the gas station to check tire pressure (which was extremely inconvenient). I looked for alternatives to this and found portable tire compressors. The videos posted here by users have really helped me narrow down my choices. I chose Hausbell because most of the reviews were positive. The device arrived quickly and today I used it for the first time. It was easy to figure out and I had no problem attaching the air hose to the stem. He filled the tire incredibly fast! I was so happy! So I'm going to list what I think are the pros and cons of the device. PROS1. Clear instructions 2. Large digits for easy reading on the display3. Well lit for use at night4. Works very quickly to inflate a tire 5. The device turns off when the desired pressure is reached (you need to specify the setting)6. Light weight7. Comes with adapters for use with balls, balloons, pool toys, etc. CONS1. It does not come with a storage box2. Although the photo shows what appears to be a cable tie, the cable was actually just twisted.3. The plastic case around the machine does not feel too strong.4. Because it is light, it will bounce a little when working. In the instructions that came with the device, there was a "guarantee" of 3 months. It explained that they were responsible for "three guarantees," but didn't specify what that was. In summary, I think this device is worth the money and serves my purposes well. I would recommend it to anyone who drives. It's also very nice that there is now a way to inflate balloons, pool toys, etc. I noticed that it says to turn off the device after 10 minutes of use and allow a 15 minute cool down period before using it again. So with big tires it might not work as fast.