First of all, it works, and it works very cool. Yes, maybe not that fast, but it's enough for a portable version.1. The problem is that you will see in the description that it supports and should charge with the latest USB-C chargers, most of you already have them with your iPhone, Macbook or Samsung. But it only supports old 5V adapters. If you have old chargers this can help, but why keep an extra charger specifically for another device? THIS MUST BE IN THE DESCRIPTION!2. It only comes with a 2000 mAh battery. The description says twice about 2x2000 mAh and once (in the comparison table) that it only has 2000 mAh.3. I tested it on a Ford Fusion 17" where all 4 tires were around 30psi and a fully charged battery was enough to inflate just 3 wheels to 35psi and for the 4th wheel I had to charge the unit first when Don't do it Don't get confused by what new chargers don't support and you have a bunch of old USB chargers lying around, it's a pretty good option for swapping out 1-2 bikes on the go.
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