[Customer Services] We offer a 2-year warranty. If you encounter any quality or usage issues with our wall clocks, we will gladly replace it with a new one or provide you with guidance on its usage and setup. Please don't hesitate to reach out to us by sending a message. [Power Supply] The LED digital wall clock operates exclusively on AC power and requires an AC adapter (not included) rated at 5V/1A (a 3-meter USB power cable is provided with the clock.). [Wall Number Clock with Light] This clock is an excellent digital clock that comes with a built-in night light. It features a light sensor that automatically adjusts the brightness with 8 levels of dimming based on the ambient light. Additionally, you can manually adjust the brightness using the remote control, which offers 3 levels of dimming (High/Medium/Low). The adjustable brightness ensures clear readability, whether it's in a brightly lit room or during the dark night. [Digital Alarm Clock with Remote Control] The remote control allows you to easily set the time format (12/24 hrs), date, alarm, manual brightness/auto brightness, and snooze function of the alarm clock. (The remote control requires a CR2025 button battery, which is included.). [Number Time Clock] This large wall clock not only displays the date and time, but also shows the temperature in Celsius or Fahrenheit. It features an adjustable night light, ensuring clear visibility even in the dark or from a long distance. With its adorable design, it is also a perfect digital clock. [15" Wall Decor Modern Clock] This 15-inch large wall clock is designed in a 3D modern style. It can be hung on the wall or placed on a shelf, making it suitable for various areas such as the living room, kitchen, gym, hotel, office, meeting room, and classroom. The dimensions of this oversized digital clock are 15.0x5.1x0.9 inches (340 g), and it is very easy to read.