Review on WATOE 6000mAh Rechargeable Portable Tire Pump – Tire Inflator Air Compressor for Car Tires, Bicycles, Balls & Other Inflatables – 150 PSI Wireless Car Air Pump with LED Light & Smart Display (Black) by Howie Broyles

This device is very fast and I found I could inflate a fat bike tire from 4psi to 28psi in 2 minutes and 15 seconds, which is 3 times more. as fast as other units! It has the same volume as other devices, so quite loud. On the downside, it's a bit larger than the other guys, and to make matters worse, the settings on this device are basically completely useless. let me explain. When I switch from 30psi (default) to 28psi to set up the bike, it reverts to the default 30psi when the mode is switched or when it is cycled off and on again. Since it doesn't save any settings, it makes the whole idea of bike/car/motorcycle/etc. settings useless! How utterly stupid! Whoever made this design decision in China, where all OEMs are based, should be fired. Luckily, the default settings are pretty close to what I want I think, but that's a serious design flaw. If it wasn't much faster than the others I wouldn't leave it because it's a very bad design decision.