Alarm system: In the alarm mode, press the MODE button for 3 seconds to enter the time setting, setting the order: hour - minute - snooze time. “AL” will light up during installation. When the alarm sounds: Press MODE to activate the snooze function. The AL icon will flash. Or press DOWN to turn off the alarm. The AL icon will be turned off. Night mode: The clock will automatically reduce the brightness of the LED in night mode, press MODE twice to enter night mode. Press MODE to turn night mode on/off. When the night mode is on, press MODE to enter the night mode setting, setting the order: start hour - start minute - end time - minute.