Automatic / Manual Brightness Dimmer LED Digital Wall Clock has a built-in light sensor, including 3 different modes, sleep mode photosensitive, automatic and manual modes to adjust the brightness. If you want to have a good sleep, you can set the wall clock digital to sleep mode, if you want to keep the brightness continuously, you can manually adjust the brightness to meet your needs, if you don't want to be disturbed by the brightness of the LED clock wall, you can adjust the wall clock to enter the automatic brightness sensitivity mode, which will intelligently adjust the brightness according to different environments. This not only meets your needs, but also brings you convenience. Memory and Alarm Clock Function: The large digital wall clock needs to be plugged into a power source to keep working, but the clock has a built-in memory function, and the time data will not be lost even if the power is cut off. In addition, the bedroom digital alarm clock also includes a dual alarm function. If you have an emergency, you can set the corresponding alarm to achieve the effect of reminding you in time. The alarm can be set according to your schedule, bringing a certain guarantee to the journey. Very suitable for children, the elderly, office workers and family members. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.