The brightness of the time display is adjustable: 6 levels can be manually adjusted. The adjustment level is: 100% - 80% - 60% - 40% - 20% - off, and it can also be adjusted automatically by light sensor. Activate this function and the product will automatically adjust the display brightness according to the ambient brightness. Free switching between 12/24 hour systems Dual alarm and volume control function: Two independent alarm functions, you can set alarms for weekdays and weekends and sleep for 5 to 90 minutes. The 5-level volume control can meet your different needs LED display: The digital alarm clock is equipped with a 6-inch S-shaped LED mirror display, which is convenient to see and easy to use. The unique design makes this digital alarm clock not only one of the best bedroom decorations, but also a good partner that wakes you up every morning for a good day USB Powered: This bedside alarm clock is equipped with a USB charging cable and also has a USB output for charging