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Means and methods of input and output data portable equipment and wireless commercial automation with uninterrupted communication radio frequency of short range and low rate of transmission.Data and methods for making such communication efficient and safe against interference and attempts to invas the privacy.
Means and methods of input and output data portable equipment and wireless commercial automation with uninterrupted communication radio frequency of short range and low rate of transmission.Data and methods for making such communication efficient and safe against interference and attempts to invas the privacy.