Magnavox MR41806BT Owners Manual - Page 7

POWER SOURCE Unwind the AC power cord and extend it to its full length. Insert the AC plug into any convenient 120V 60Hz household outlet as the illustrated below: NOTES:  This unit is equipped with a polarized AC plug which has one blade wider than the other. This is a safety feature to reduce the likelihood of electric shock. This polarized AC plug will only fit in a polarized AC outlet. If you find that you cannot insert this plug into your outlet, you may have an obsolete non-polarized outlet. Please do not try to defeat this safety feature by using a non-polarized adaptor or by filling the wider blade to make it fit into your outlet. If this plug does not fit into your outlet, you should contact a qualified licensed electrician to replace your obsolete outlet  If the AC power failure, this electronic clock is designed to continue operating internally (without showing the time on the Clock Display) with two (2) AAA size batteries (not included). Install the batteries as follows:  Open the battery door on the rear of the unit by sliding it out and then lifting it.  Insert two (2) AAA size batteries (not included) according to the polarity diagram inside the battery compartment. (Alkaline batteries are recommended.)  Replace the battery door. 6