“A tire 25% below its recommended pressure is three times as likely to be involved in a crash, while a tire 25% high is twice as likely as a properly inflated tire”, according to data from the National Highway Transportation Safety Agency. It is so important to keep all tires properly inflated. The AZUNO Digital Tire Inflator Gauge makes filling tires extremely easy when using an air compressor. Instead of filling a tire, check the pressure, adjusting, checking, and repeating over and over again, simply fill the tire to the exact pressure you want. Fill a tire to specification twice as quickly or even faster by using fewer instruments. Save time and just fill it right the first time. Accurate Pressure Check: The tire inflator gauge can check pressure by itself, as same as tire pressure gauge, simply connect chuck to tire air valve. Professionally calibrated gauge to always return a reading within 1% of the exact pressure of your tire and 0.5 display resolution. No more guessing.