Description: Model: Mini tire preure gauge Small and exquisite, easy to carry around, is the best choice as a gift! Product size: 61*32*15MM Accuracy: +/-1 PSI Preure test range: 3-150 PSI New upgrades (our products are now greatly improved in accuracy, most of the current market is 0.05 bar accuracy, our products are now 0.01 bar accuracy, fully upgraded) First, the accuracy is improved: 1, psi unit mode can be accurate to 0.1psi 2, bar unit mode can be accurate to 0.01bar 3, kpa unit mode can be accurate to 1kpa 4, kg / cm unit mode can be accurate to 0.01kg / cm After the preure measurement, the reading can be freely converted, which is convenient to use. Specifications: Conversion of the unit of measurement of barometric preure There are generally four types of air preure measurement units: psi, bar, kPa, kg/cm2. The conversion relationship between them is: 1 bar =0.069 bar=6.9 kPa=0.07cm2 1 bar=14.5 psi=100 kPa=1.02 kg/ cm2 1 kPa = 0.145 psi = 0.01 bar = 0.01 kg / cm 2 1 kg/ cm2 = 14.2 psi = 0.98 bar = 98.07 kPa Instructions 1. Turn on the machine and pre the switch to select the preure unit you are using. 2. Use the preure gauge nozzle to pre the tire valve to make the contact between the nozzle and the valve tight, and no air leakage can occur. 3. The value of the tire preure is displayed on the LCD screen. 4. Standard tire preure depends on the preure standards of automobile manufacturers and tire manufacturers. 5. This product can be automatically shut down, saving electricity and low carbon. ,... Package Included: 1* tire preure gauge Notes: Due to the difference between different monitors, the pictures may not reflect the actual color of the item. Compare the detail sizes with yours, please allow 0.5-1cm error, due to manual measurement. Please leaving a meage before you give the bad feedback, if the products have some problems. Thanks for your understandings