[3 Light Colors & Adjustable Brightness] - Each head of our reading light has an independent sensor switch. Long press can adjust the brightness, and short press can switch the color of the light. Additionally, our reading lights are available in COOL WHITE, WARM YELLOW and WARM WHITE colors for you to choose from. You can adjust the reading light according to your personal needs to provide you with a comfortable lighting environment. [Ergonomic Design & Lightweight] - Our book light can be bent and folded into any shape you want, which can meet your different lighting needs to a greater extent. In addition, our book light only weighs 0.15kg, so there is no obvious weight-bearing feeling on the neck, and it can also be easily carried when going out. [Long-lasting & USB Charge] - This upgraded version of our rechargeable neck reading light, with a built-in 1000mAh rechargeable lithium battery, can not only work for 7-13 hours, moreover, at the lowest brightness, our reading lamp can be used for up to 80 hours, but also can charge it with a USB charging cable to ensure its normally use.