Canon imagerunner advance C5550i User Manual page 1136

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HDD Mirroring Kit
The HDD Mirroring Kit enables you to back up the data on the hard disk of the machine to the additional optional HDD.
Even if one fails, you can access the other hard disk.
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Connection Kit for Bluetooth LE
This option enables Bluetooth communication between the machine and mobile devices.
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NFC Kit
This option enables you to easily link the machine with mobile devices. You can also print simply by touching a mobile
device to the machine.
Appendix
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