Adjustable Brightness: The LED digital alarm clock has 3 brightness levels. You can adjust the brightness from low to medium to bright or turn off the LED display. The low-light screen is well lit in dark rooms, displays the time effortlessly, and protects your eyes. <br> EASY TO READ, MINI PORTABLE: This is a beautiful modern mini alarm clock with a cool white screen. Bold numbers and colors make it easy to read and stylish. Simple and small. This small alarm clock can be placed on the bedside table or dresser to save space. It can also be used as a portable mini travel clock to take with you. <br> Plug and battery operated: LED alarm clock can work with (note: USB cable included, but no power adapter or battery). The permanent light only works if the watch is permanently connected to a charging socket. If you are only using the battery, the LED display will turn off after 8 seconds, go to sleep mode, press any which key to wake up the screen for 8 seconds. <br> Dual alarm, setting alarm days, snooze: The powerful alarm clock can set two alarms, one to get up, you can enjoy snooze 5 minutes and one for work/school reminders. The LED alarm clock can set different alarm days to meet your different alarm day needs. <br> Day display and 12/24 hour function: Day and time can be displayed on the same screen, no need to switch screens, and the day of the week can be read easily. Choose between 12/24 hour time display according to your own habits.