VocoPro KJM-7900 PRO - Manual (Page 2)

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 exclaimation point within an equilateral triangel, is intended to alert
the user to the presence of important operating and maintenance
(servicing) instructions in the literature accompanying the appliance.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE RISK OF ELECTRIC
SHOCK, DO NOT REMOVE COVER
(OR BACK). NO USER-SERVICABLE
PARTS INSIDE. REFER SERVICING TO
QUALIFED SERVICE PERSONNEL
GENERAL WARNING