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The lighting flash with arrowhead symbol, within an equilatera. triangle, is intended to alert user to the presence of uninsulate. "dangerous voltage" within the product's enclosure that may b. of sufficient magnitude to constitute risk of electric shock t. persons. The exclamation point within an equilateral triangle is intende. to alert user to the presence of important operating an. maintenance (servicing) instruction in the literature accompanyin. the appliance. SPECIFICATIO. FREQUENCY RANGE