Pyle DT-9918T Operating Instruction page 5

This WARNING symbol indicates a
potentially hazardous situation, which
if not avoided, could result in death or
serious injury.
This CAUTION symbol indicates a
potentially hazardous situation, which
if not avoided, may result damage to
the product.
MAX
This symbol advises the user that the
terminal(s) so marked must not be
connected to a circuit point at which
the voltage with respect to earth
ground exceeds (in this case) 1000
VAC or VDC.
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