[Three Alarm Times] The LED alarm clock has three alarm times, 1-5 (Monday to Friday), 1-7 (weekdays), 6-7 (weekend mode), you can set the alarm clock for weekdays and weekends separately, allowing you to sleep in on weekends. The default system for the alarm clock is 24 hours, to switch to 12 hours, press the \"TIME SET\" button [USB or Battery Powered] The morning alarm clock is powered by USB cable or 3 AAA batteries (included), with the battery installed, the set alarm will sound even if the mains power is disconnected, and the battery will remember all alarm settings. When the battery is low, the screen will display a low battery icon to remind you to replace the battery as soon as possible. After replacing the battery, the low battery icon will disappear [2 alarms with snooze] The teenage alarm clock can set two alarms, and each alarm has an independent switch, convenient for you and your family to have different schedules, you can take a nap for five minutes. In addition, when the alarm rings, the volume gradually increases, allowing you to wake up comfortably from your dream. [4 Adjustable Brightness Levels] The bedside digital alarm clock best meets the brightness needs of different people. The lowest brightness level of the alarm clock completely turns off the screen and does not disturb your sleep at night. Please note: When using only the battery, the screen brightness lasts for 10 seconds. If you want the screen to be on all the time, it is recommended to use USB power [Mini Travel Alarm Clock] Size: 10 x 10 x 3.5 cm (3.93 x 3.93 x 1.37 inches), extremely modern in style and easily blends into your various decors. The alarm clock weighs only 150 grams, making it light and convenient to carry, you can also take it with you when traveling