AmazonBasics B005PJJ89U Manual De Instrucciones página 5

To use:
Measuring pressure
1. Press Set. The display lights and "0.0" appears. The default
unit of measure is PSI.
2. Remove the cap from your tire valve.
3. Push and hold the nozzle on the gauge against the valve stem
until the pressure reading is displayed and locked.
4. Remove the gauge from the valve stem. The pressure
reading stays on the display for 10 seconds. The display
returns to the "0.0" reading, then turns off after 10 seconds.
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