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 Matthew Seamster

After about 5 hours of charging I tried to use it. I attached it to the tire valve as directed and tried to turn it on but it wouldn't turn on. After several attempts I unplugged it from the car and then turned it on without connecting it to the car valve and it turned on. After playing with it for a while, I reattached it to the tire valve and found that if I moved the knob even slightly, it would turn on. It successfully inflated the tire, I only had to add 5psi and it took about 5 minutes. When I checked the battery level on the inflator, it was just over half. I figured it wouldn't work and sent it back to Revain. It's a good and compact product and would be great if it worked as advertised but it's a waste of money.