[. . . ] This symbol warns the user of dangerous voltage levels localized within the enclosure. [. . . ] If you are unable to insert the plug into the outlet, contact an electrician to replace your obsolete outlet. â· Protect the power supply cord from being pinched or abraded. â· This product should only be used with a cart or stand that is recommended by the manufacturer. â· The power supply cord of this product should be unplugged from the outlet when left unused for a long period of time, or during electrical storms. â· This product should be serviced by qualified service personnel when: the power supply cord or the plug has been damaged; or objects have fallen, or liquid has been spilled onto the product; or the product has been exposed to rain; or the product does not appear to operate normally or exhibits a marked change in performance; or the product has been dropped, or the enclosure damaged. â· Do not drip nor splash liquids, nor place liquid filled containers on the unit. [. . . ] This jack can also be used as an unbalanced line output by using either a stereo or mono 1/4" phone plug connection. [. . . ]