CipherLab CP30 Series Reference Manual page 5

For a liquid crystal display (LCD) or touch screen, use a clean, non-abrasive, lint-free
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cloth to wipe dust off the screen. DO NOT use any pointed or sharp object to move
against the surface.
If you want to put away the mobile computer for a period of time, download the
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collected data to a host computer, and then take out the battery pack. Store the
mobile computer and battery pack separately.
If you shall find the mobile computer malfunctioning, write down the specific scenario
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and consult your local sales representative.