How to use the AA Digital Tyre Pressure Gauge
Remove dust cap on the tyre valve & place the head of the digital tyre pressure gauge over the tyre valve, pressing firmly. Press the On button & hold gauge on the valve until the reading on the LCD display locks. Remove the gauge quickly & take the reading. The gauge will automatically turn off 30 to 90 seconds after use to save the battery & extend the battery life.
works on the included 3 x Button cell AG13 or LR44 batteries, To replace the batteries, you will need a small diameter Phillips screwdriver to unscrew the two screws which hold the two halves of the case together. Easy enough!