You may find a manual from the manufacture. hold the mode button down 3-5 sec's. the hr should blink ,use the opposite side buttons to change the number, then press mode again mins blink change, do this and set hr,min,sec, am or pm? then date month,day yr. press final time and time should be shown with no blinking. you can also hold in all buttons and let beep 5 times it resets to zero defalt settings
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you may have to open the back and remove the battery to re set it. use a push pin to unclip the battery. if you see an ac button on the board you may need to reset it too , tweesers one point on ac, and on on top of battery. reseal the rubber gasket with light grease or vasuline
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