Нужен перевод текста. BLUETOOTHSecurity is taken care of through the frequency

Нужен перевод текста.
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Security is taken care of through the frequency hopping and 40-bit encryption. As the system uses radio, it сan work through some barriers briefcases, shirt pockets and desktops, for example but it wont carry through office buildings. The power level of the transmitter can be varied, with feedback from the remote side of the link used to set the output to the lowest level commensurate with error-free operation. This saves power and increases the usable density of devices.