Whynter KS-1200 - Manual (Page 3)

Press the “MODE” button again, hour will flash on the display.
Press the “UNIT” button to setup the hour.
After finish setting the time, press the “MODE” button to exit Time Setting.
COUNTDOWN TIMER SETTING
Press the “MODE” button to change the scale to countdown timer mode.
Press the “MODE” button and the second will flash.
Press the “UNIT” button to setup the second.
Press the “MODE” button and the minute will flash.
Press the “UNIT” button to setup the minute.