Nevir NVR-TAB97 S3 Manual De Instrucciones página 33

The symbol indicates that dangerous voltages constituting a
risk of electric shock are present within this unit.
The symbol indicates that there are important operating and
maintenance instructions in the literature accompanying this
unit.
CAUTION:
When the apparatus was in electrostatic circumstance, it may
be malfunction and need to reset by user.
The USB memory stick should be plug in the unit directly.
USB extension cable should not be used to avoid failing of
data transferring and interference caused.
EN-3