Digital Temperature Clock: The LED display is mirror-like, with a clear and bright appearance, showing the time and temperature. The time display supports 12-hour and 24-hour formats, and the temperature display supports switching between Fahrenheit and Celsius for easy reading. USB Power Supply and Built-in Backup Battery: We have included a rechargeable USB cable with the smart clock for convenient power; the built-in rechargeable battery can save your clock settings when the power is out. 4 Brightness Levels: Four brightness levels can be adjusted, from soft light to bright light. Press the snooze/light button to switch between levels. It's very suitable for bedrooms and bedside use. When connected with a USB cable, the LED indicator will always be on. 3 Volume Levels & 13 Sounds: This is a silent alarm clock, and you can adjust the volume of the 13 alarm sounds by pressing "+" or "-" when the volume is set or the alarm is activated. Easy to adjust. Best gift for family, friends, and children. Voice Control: The rechargeable bedroom clock can be used with voice control. When the LED alarm clock is operating without a power cord, the screen automatically turns off after 8 seconds. When the ambient noise reaches 90 dB or the clock is touched, it will automatically turn on. Save energy and sleep better at night.