Works exactly as stated in the product description. I've used it to inflate car tires to 43-44psi. My first tire inflator didn't have a pressure gauge, so it came in very handy. I checked the accuracy with two other pressure gauges I had lying around. They were all about the same. The second tire inflator I bought (the first ran forever and was very noisy) had an analog gauge built in which I thought would make this digital gauge redundant, but good thing I had it because the analog far was removed. . Uploaded a photo of all sensors. I definitely prefer digital.