Sling Media Sling Slingbox PRO-HD SB300-100 User Manual page 22

Note to CATV Installer:
This reminder is provided to call the CaTV system installer's attention to
section 820-40 of the nEC, which provides guidelines for proper grounding
and, in particular, specifies that the cable ground shall be connected to the
grounding system of the building, as close to the point of cable entry as
practical.
10 20
The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presence of uninsulated "dangerous voltage" within the
product's enclosure that may be of sufficient magnitude to
constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended
to alert the user to the presence of important operating
and maintenance (servicing) instructions in the literature
accompanying the product.
WARNING:
To reduce the risk of fire or electric
shock, do not expose this product
to rain or moisture.