Large Display Multi-functionDigital alarm clock with large LED display , which lets you check the time clearly at a glance even it is far from you.Our desk clock with 5 mode: clock mode, date mode, temperature mode, night mode (ON/OFF),alarm mode.The buttons on the rear are very self explanatory, so it is very easy to set upThe "colon" between the hour and minute display flashes continuouslyAdjustable BrightnessSimply press UP/DOWN to adjust the 3 levels of brightness (Bright/ Medium /Low).Besides, the digital alarm clock will automatically be dim during 18:00-6:00 under the night mode (or you can set another period of time for your need).Just press and hold the snooze button for more than 3 seconds to turn off the display to prevent the screen from lighting up at night while sleeping.(NOTE: If you use a cable for power supply, the clock will always be on.)Voice Control Power Saving Mode When Powered by battery, you can get a extra function - voice control, which means you can activate the display by make some noise like clapping your hands, rapping on the table or touching the clock.In addition, the Digital Alarm Clock will automatically turns off after 16 seconds of no operation and enters power saving mode, but the system still keeps normal timing and temperature and maintains the previous settings.Warm TipsIf the Digital Alarm Clock can't work and display, Please first check the alarm clock to determine whether the LED screen is turned off or the alarm clock is not working.;a) When by USB powered, please check whether the two ends of the data cable are not in good contact or not plugged in, or check whether there is a problem with the charging portb)When it is battery powered and does not light up, please check whether the batteries are properly placed, please ensure that the positive and negative poles of the batteries are correctly placed