[Customer Services] We provide a 2-year warranty on all our products. If you experience any issues related to quality or usage, please feel free to contact us via email, we will assist you promptly in resolving the matter. [Plug-in Power Supply] This big white wall clock operates using a 5V/1A AC adapter (not included). It comes with a 3m USB power cable for easy connection. The clock has a built-in supercapacitor, which provides approximately 2 hours of time memory in case of a power failure. Please note that the supercapacitor is not intended for regular power supply, but solely for preserving time settings temporarily. [Dynamic Neon LED Clock] This sleek clock features large LED numbers, making it perfect for LED wall decor. The numbers are easily readable from a distance and in low-light conditions. With dimensions of 15.0x5.1x0.9 inches and weighing 350g, it is an ideal gift for those who appreciate LED clock aesthetics. [Alarm Clock with Remote Control] This neon clock is equipped with a remote control for convenient operation. With the remote control, you can easily set the 12/24-hour format, date, manual or auto dimming, temperature in ?/?, and alarm with a snooze function. Additionally, the remote control comes with an included CR2025 button battery. [LED Clock Dimming] You can customize the LED digital clock's solid color by adjusting the brightness to High/Medium/Low/Auto/Off using the remote control. Moreover, the built-in light sensor enables automatic dimming with 8 levels based on ambient light conditions. The adjustable brightness ensures clear readability, whether in bright light or during nighttime. [15" LED Wall Clock] This digital clock offers 3 LED light modes: RGB Dynamic neon color, 6 solid colors, and gradient color, it is wonderful room decor aesthetic for enhancing the ambiance of your living room, bedroom, classroom, gaming room, or gym. A cool clock for those seeking a modern and aesthetic touch to their space.