Digital 999 Days Countdown Timer Magnetic Backing with 2C batteries included for Vacation Retirement Wedding Lab Kitchen Project MeetingWhite

HEY, look here, I hope to help you if you have lost the manual,  our products are worth your time to research. ?Key function description:    1.CLOCK Key: to set CLOCK time    2.DOWN Key: display the 12/24hour systerm.in the setting mode,press it can reduce  the flash value    3.UP/START Key:start or stop the countdown. in the setting mode,press it can increse the falsh value.  4.SET Key:to set countdown time. ?How to setting clock time:    1.Press and hold the CLOCK key for 2 seconds to enter the setting mode,and the number of hour will be flashing.    2.Press the UP/START key to increase the flashing value,press the DOWN key to reduce the flashing value.Holding down it can change the flashing            value  at high speed.     In the clock mode,press the DOWN key to display the 12/24hour system.    3.Each press of the SET key can switch flashing value in turn.   4.After finishing setting,Press the DOWN key to display the 12/24 hour system. ?How to setting countdown time: 1.Press and hold the SET key for 2 seconds to enter the setting mode,and the number of days will be flashing. 2.Press the UP/DOWN key to increase the flashing value,press the DOWN key to reduce the flashing value.    Holding down it can change the flashing value at high speed. 3.Each press of the SET key can switch flashing value in turn.  (days-hours-minutes-seconds)  4.If necessary,you can press the DOWN and UP/START key to reset to 0  5.After finishing setting ,Press the SET key to complete it and exit setting mode.