US Patent 7907048 Fire extinguisher accessory device providing voice instructions

A fire extinguisher accessory device for providing oral instructions for using a fire extinguisher comprising a housing, a digital memory circuit disposed inside the housing, wherein the digital memory circuit can provide oral instructions for using the fire extinguisher such as “pull,” “aim,” “squeeze,” and “sweep”; a speaker disposed on the front surface of the housing; an amplifier disposed inside the housing; and a pressure switch operatively connected to the housing via a lead, wherein when the pressure switch is compressed, the digital memory circuit is activated and provides oral instructions for using the fire extinguisher.