PM3 Commands Reference (Iceman Firmware):

Main Help

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Current command:
lf em 4x05 dump --help

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Dump EM4x05/EM4x69.  Tag must be on antenna.

usage:
    lf em 4x05 dump [-h] [-p <hex>] [-f <fn>] [--ns]

options:
    -h, --help                     This help
    -p, --pwd <hex>                password (00000000)
    -f, --file <fn>                override filename prefix (optional).  Default is based on UID
    --ns                           no save to file

examples/notes:
    lf em 4x05 dump
    lf em 4x05 dump -p 11223344
    lf em 4x05 dump -f myfile -p 11223344