Friendly Tip: The alarm clock has many functions but few buttons, so the operation is relatively complex. If you have any questions, please do not hesitate to contact us. In addition, the dot in the middle of the alarm clock will blink, and the buttons make a clicking sound. The colors of numbers and symbols are colored and fixed, and do not change. Corded Power and Memory Function --- The alarm clock is only powered by the cable, so you must plug in the power supply for the digital clock to work properly. When you install the memory batteries (3 AAA batteries), the alarm clock will have a memory function, which means that even if there is a sudden power outage, although the clock is not displaying the time, the time will continue to run. When you plug in the power supply again, you do not need to reset the time. The alarm clock can be set to display mode as needed --- our alarm clock can display the time continuously, or display time/date/temperature in rotation (time displayed for 10 seconds, date and temperature each displayed for 3 seconds). The 12-hour and 24-hour clock modes can be switched freely, under the 12 hour system, the PM icon will be displayed in the afternoon.. The temperature mode can be switched between °C and °F. The small bedside alarm clock also has a snooze function --- When the time comes, the alarm clock starts a “beep beep beep” alert, and gradually increases in frequency to wake you up quickly from your sleep. The alarm can last for 1 minute or can be stopped by pressing any key. You can also press SNZ/LIGHT to enter snooze mode (only once). The snooze time can be set from 1-60 minutes. Adjustable Brightness Desktop Alarm Clock --- Our colored digital alarm clock has three adjustable brightness levels (limited by the color light beads, brightness cannot be adjusted to very dark), in the night or when the light is dark, you can press the SNZ/LIGHT to turn off the screen, and press any key to wake it up. You can also set a night mode, where the brightness automatically decreases between 18:00-6:00. The time interval for night mode can also be adjusted according to your needs. Multifunctional Digital Alarm Clock --- The 6.5-inch clock combines various functions and serves as a digital bedside clock as well as a portable thermometer and digital calendar. Despite its small size, the clock features colorful LED digits that are easy to read from multiple angles and do not produce any ghosting.