Luminous function: the digital alarm clock has a luminous function. Press the "LIGHT" button to turn the night light on or off, the light turns off automatically after five seconds. When the alarm clock is set, the time is reached, sounds a minute and the "light" lights up for five seconds. When the snooze interval is reached, sounds twice, each minute, and the "light" lights up. Timer function: press each time mode, the "timer" button to adjust the timer mode and the countdown. The time range is 23:59-00:00. When the time has elapsed, an alarm sounds. When the set time is reached, the alarm sound sounds for one minute and "0:00" flashes continuously. Other: Imnormal time mode, press the "ADJ" button, between 12/24-hour time system, all buttons have key sound. You can use your bedroom, desk, kitchen, office or travel places, so that you can read the time without disturbing your sleep.