I ordered this wireless inflator after midnight and it was delivered by 7pm. Kudos to Revain for <20 hours FREE Shipping! Out of the box I had to charge the battery for about 3 hours before I got the green light. It took 11 minutes to inflate a completely flat car tire from 5psi to 40psi. It's a lot longer than my plug-in compressor and got pretty hot when it finished, but this cordless inflator is much more convenient to use and not as noisy. He still had enough energy to add 4psi to each of the other three car tires with a spare battery. When I was done, it took me about 5 hours to recharge the battery. It has an LCD screen that makes it easy to read the pressure. You can set the pressure you want to pump to, put the pump on the ground and wait for it to stop automatically when it reaches the pressure you want. I found it inflated 0.5-1psi. . You want some slack to lose air when you take it off the valve and check the pressure with an analog gauge. I also prefer a clamp mount on the valve over a screw mount. The clamp works faster, easier, does not lose much air when pulling off, fingers do not get dirty. It has its own LED backlight, useful in the dark, a car power adapter if you need to plug it in. for on the go, gloves for working with the pump in hot weather, nozzles for inflating balls, toys etc. and a carrying bag. Overall, it's a good choice for tire pressure maintenance and other small jobs.
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