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. 3 lights can be adjusted: warm white light, yellow light, white light Adjustable brightness mode: the brightness can be adjusted from 100% to 50%, and the reading brightness is the more suitable can be customized, and its soft light can provide readers with an accurate reading mode when reading books. only as a reading lamp, but also as a bookmark, a good helper for adults or children to read before bedtime, and an ideal gift for children and adults.