3 color temperatures: white light, warm light, and natural light. The brightness of each color temperature can also be adjusted. Just long press the button to adjust the color temperature brightness. You can adjust the color temperature and brightness according to your preferences and usage scenarios 270° Rotating Lamp Head: The lamp head of this reading lamp with hanging neck can be rotated 270 degrees. When you put it on the table as a desk lamp, you can change the light angle by adjusting the position of the lamp head. Easy and fast to meet your daily needs Ideal Design: The flexible gooseneck allows you to bend it 360 degrees to any position you want, which fits the USB port perfectly. The lightweight and compact design is easy to carry and even convenient for travel Smart wave sensor: The reading light is equipped with sensitive sliding control, no need to grope for buttons in dark environment, just wave your hand to turn it on, the sensing distance is less than 8cm Compatibility: Suitable for various USB devices (5V, 0.5-2A) 2.0 and 3.0, such as laptops, desktop PCs, power bank, etc., no battery required Specifications: Material: ABS Light color (three colors adjustable): white light/natural light/warm light Product size: 22x2.7x2.3cm Power: 2.5W Color temperature: 3000-6000K