Review on 🔧 Kensun AC/DC Tire Inflator Pump - Swift Performance 2.0 Portable Air Compressor Pump for Car and Home: 12V DC & 110V AC by Travis Coffman

I buy this product so I don't have to spend $1.50 at the gas station every time I need some air I've only used this product twice and don't have time more to fully characterize the nature of the printing error.1. The first time it was used it was used indoors with the spare tire removed and the unit running on 120 volts AC. Free time was released and the instrument programmed to 35.5 psi. To achieve an actual pressure of 33psi. which should have resulted in 33psi but NOT Two tires measured 48psi and the third 50psi AC and in (2) I was running 12V DC (cigarette lighter). I return this toy and get something else. I gave it one star for ease of use, but it's really a PERFORMANCE issue, it didn't work well, but it's easy to use, and an idiot can use it, but there is NO performance category!