Adjustable Brightness: The digital LED alarm clock has 4 brightness levels. You can adjust the brightness from low to medium to bright or turn off the LED display. Low glare display is well lit in dark rooms, shows time effortlessly and protects your eyes. 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 elegant. Simple and small. This small alarm clock can be placed on the nightstand or dresser to save space. It can also be used as a portable mini travel clock to take with you. Plug & Battery Operated: LED alarm clock can be powered by it (Note: USB cable included, but no power adapter or battery ). Permanent illumination only works if the watch is permanently connected to a charging socket. Dual alarms, set alarm days, snooze: Loud alarm clock can set dual alarms, one for getting up, you can enjoy a 5-minute nap, and one for work/school reminders. The LED alarm clock can set different alarm days to meet your different needs for alarm days. Day display and 12/24 hour function: day and time can be displayed on the same screen , there is no need to switch screens and the day of the week can be easily read. Choose between 12/24 hour time display according to your own habits.