Sony PDBK-A640 Installation Instructions Manual page 19

Note
Installation of the PDBK-101 in the PDW-F70 may require an upgrade
of the firmware of the PDW-F70.
Installation of the PDBK-101 in the PDW-F75 does not require an
upgrade of the firmware of the PDW-F75.
For details, ask your Sony dealer or a Sony service representative.
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