Multifunctional Grandfather Clock: There are 5 buttons on the back of the bedside alarm clock to adjust different modes. The modes of the digital bedside clock are clock mode, date mode, temperature mode, night mode, and alarm mode. This children's alarm clock is equipped with a large 16*6*2.7cm LED screen, which is easy to read. Adjustable Brightness and Night Mode: Press the "UP" button to adjust three brightness levels (bright/medium/low). In night mode, it dims without disturbing sleep. You can also set the night mode time according to your needs. Powered by USB or Batteries: The digital bedside alarm clock can be powered by one battery (three size 7 batteries, not included) and a USB charging cable. When powered by batteries, the alarm automatically turns off after 16 seconds to conserve power. You can activate the display by ringing the alarm or pressing any key. Package Contents: The package contains 1 bedside alarm clock, a black plastic casing, a black light display, and a modern, simple style. Easy to Use and Ideal for Gifts: Our alarm clocks are perfect for bedside use or as children's alarm clocks. They make excellent gifts for holidays, birthdays, and Christmas.