The Hot Sale Personal Design Mini Usb Smart Night Light Cylindrical Lamp - Two-color Positioning-dry Battery Type is an innovative and cost-effective lamp that provides efficient and adjustable lighting for bedrooms, offices and any other dark places. It is designed with two colors and size options that you can place in different position with its cylindrical shape. The lamp is designed with dual color and position settings, allowing you to choose between a warm white light which is best for creating a cozy atmosphere and a cool white light which is perfect for reading and studying. Additionally, the lamp has three adjustable brightness settings which enables you to control the amount of light according to your needs. The lamp is also energy saving, as it only complements its environment instead of replacing existing lighting. The Hot Sale Personal Design Mini Usb Smart Night Light Cylindrical Lamp - Two-color Positioning-dry Battery Type can be powered by any USB port, or by three dry battery. The USB port allows you to power it from your laptop or power adapter. And the batteries enable you to place it in locations without any electricity outlet. The lamp is sealed for protection against moisture, dust, and corrosion and is also temperature and shock resistant, making it an ideal choice for indoor or outdoor use. In summary, the Hot Sale Personal Design Mini Usb Smart Night Light Cylindrical Lamp - Two-color Positioning-dry Battery Type offers efficient and adjustable lighting and can be powered by either USB or batteries, making it a convenient and cost effective solution.