Note: 1 Please tear off the screensaver film before use, so it looks clearer.2 This watch is waterproof for daily use, capable of washing hands and being exposed to rain;It is not allowed to wear the watch for swimming or bathing. Try to keep the watch dry as much as poible to extend its service life. Instructions: 1: Under normal display status:Pre the M key: Pre once to activate the stopwatch function;Pre twice to set the alarm clock;Pre 3 times to set the time calendar;L=LIGHTM=MODES=STARTR=RESET.2: Under normal display status:Pre the S key to display the date,Pre the R key to display the alarm time.3: 12/24 hour status setting:Under normal state: Pre the M key 3 times to enter the time adjustment state,Then pre the R key twice again to enter the hour adjustment state,Then pre the S key again to adjust the 12/24 hour system.After setting, pre the M key once again to return to the normal time display.P or PM represents afternoon (12h).H represents 24-hour system.4: Time setting:Under normal display state: Pre the M key 3 times to enter the time adjustment state,Flash in seconds, pre the S key to proofread the seconds;Pre the R key again, the sub flash, and pre the S key to calibrate the sub;The method of sampling is to pre the R key to adjust the hour, date, month, week status, and then pre the S key after flashing;After all adjustments are completed, pre the M key once to return to the normal display status.5: Alarm settings:Under normal display status: Pre the M key twice to adjust to the alarm state;Then pre the S key to adjust the hours. After the adjustment is completed, pre the R key once, and then pre the S key to adjust the minutes. After the setting is completed, pre the M key to return to the normal display state.6: Alarm switch settings:Pre and hold the R key while preing the S key to select the alarm clock on/off.When the alarm is on, there is an alarm that matches the display. When the alarm rings, preing the S key can temporarily stop it; Pre the R key to turn off the alarm directly.7: On hour reminder settings:Pre and hold the R key while preing the M key to select the full time reminder function on/off,When the reminder function is turned on, all items will be displayed for the week. When the hourly reminder is turned off, all weeks are not displayed.8: Stop watch setting method:Under normal display status: Pre the M key once to enter the timing function, then pre the S key to start the timing, and then pre the S key again to end the timing, displaying the numerical value;Pre the R key to reset the value, and pre the M key to return to the normal display time.9: Night light settings:When preing the L key, the light will turn on, and prolonged preing of the light will consume a lot of electricity.