1. The display brightness is adjusted. On the left side of the clock, there is a pinion that can adjust the display brightness. 2. On the right side of the clock, there is a pinion that can adjust the color of the top of the clock. It can be adjusted according to personal preferences. 3. One clock can be used for both alarm and charger. Behind the clock, there is a DC 5V power socket, and there is also a USB output power port that can charge the mobile phone. 4. Beautiful gifts. This is a good choice to express your concern, and it is also a surprising and unusual idea. This digital alarm clock is a perfect gift for everyone, whether old or young, men or women, boys or girls. It also applies to any festival, such as birthday, Christmas, Valentine's Day, Father's Day, Mother's Day, etc.