For such a small package this little electric pump really gets the job done. I opened it up, charged it fully via the USB cable, and then ran around looking for anything and everything I could pump up. These included a garden cart, a wheelbarrow and some vintage bicycles. Also works great on air mattresses. It's amazing how fast it is and while you can hear it, I don't think it was particularly loud. Pressure - over 100 psi - which some use. The thumb lock connector is designed for standard automotive valves. For the European "Presta" valve, I simply used a commonly available adapter, with an o-ring being preferred when the pressure approaches 100psi. I like around 85-90 on my road bike so that was fine. For maintenance and low pressure applications such as mountain bikes and garden equipment. Oh, that's great! I'll admit I'm lazy and could have just used my hand pump to go pump, pump, pump, pump like I always do, but it was a lot easier to walk around with this little guy and then just buckle him up and let him do the whole thing. Work. I'm still on my first full charge, so the built-in battery seems more than enough. Simply set the value you are used to (psi, metric or so-called bar) first and then set the desired pressure. you want max. In some cases I just hit the off button when I wanted to stop at a lower setting instead of changing the max pressure setting. Just follow the LED display. I tested it with a handheld meter and found it reliable. My only real complaint is that the LED screen is a bit difficult to read at acute angles, a minor issue. The hose is short because it is stored in a small cube so keep that in mind and the first or second time I used the fitting it was quite tight and required a bit of effort but after that it went right up to the valve . and i was able to block it easily. I can chat and fit a Topeak brand thumb connector (they have a proprietary version that fits both standard and presta valves). So for the price and compact size it's so handy that I'm considering getting another one and keeping one in each car for bikes and also for emergencies.
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