USB charging port design: It has a USB port and can be charged with any general USB interface. You don't need to carry a USB charging cable with you. After charging 40-60 minutes, the bulb can work for 2-3 hours. Flexible and Adjustable Angle: You can adjust the reading angle according to your eyes. The LED lens can be rotated 45 downward, horizontally rotated 90 left and right, and bent flexibly with a bracket to adjust the most comfortable angle for you. Portable Design: Compact design, small and light, is very convenient to carry and use at home or out, it is very suitable for reading on a clipboard and is a good helper for reading enthusiasts. and the most suitable reading brightness can be customized, and its soft light can provide readers with an accurate reading mode when reading books. Versatile Use: The new design of the clip-on reading light can be used not only as a reading light, but also as a bookmark, a good helper for adults or children to read before bedtime, and an ideal gift for children and adults. Note: The data is manual measurement, please allow 1-50cm error, due to differences between light and screen, there will be a certain color difference, the specific received in nature prevail.