"[Large display and functions] Digital alarm clock with large LED display (6.3" x 0.7 "to 1" x 2.3 "), you can clearly see the time even from a long distance. Our desktop clock has 5 modes: Clock mode, Date mode, Temperature mode, night mode (on/off), alarm mode. The buttons on the back are very simple to describe, so it is very simple to install! The "colon" between the hour and minute display will continuously flash ", "[Adjustable brightness] Just press up/down to adjust the level 3 brightness (bright/medium/low). In addition, in night mode, the digital alarm will automatically dim during 18:00-6:00 (or you can set another time according to your needs). Simply press and hold the snooze button for more than 3 seconds to turn off the display and prevent the screen from lighting up at night. (Note: If you use a cable for power, the clock will always be on.) "[Weekday Mode and Snooze Mode] Our digital desk clock has 3 alarm modes to choose when you need to wake up at a fixed time: Monday to Friday/Monday to Sunday. Simply press and hold the "Alarm" button, then use the "UP" and "Down" buttons to adjust the hour/minute/snooze/workday mode. In addition, press the Snooze button when the alarm is off, or press any other button to cancel the alarm to get 1 to 60 minutes of extra sleep. "[Voice control and power saving mode] When powered by a battery, you get an extra feature - voice control, which means you can activate the display by making some noise, such as clapping your hands, tapping on the table, or touching the clock. In addition, the LED alarm automatically turns off after 16 seconds of no operation, entering power saving mode, but the system still maintains normal timing and temperature and maintains the previous Settings. "[Two types of power supply] This bedroom alarm clock comes with a 1 meter / 39.37 inch power cord (without AC adapter) - very energy efficient, with time memory when charged with AAA battery. (Powered by USR only, no time for memory function after shutdown). "If the LED clock does not work and display, please check the alarm clock first to determine whether the LED screen is off or the alarm clock does not work." a) For USB power supply, please check whether the two ends of the data cable are not well connected or plugged in, and confirm whether there is a problem with the charging port. b) When the battery power supply does not light up, please check that the battery is correctly placed, please make sure that the positive and negative terminals of the battery are correctly placed."