USB Charging: Built-in USB connection can be easily charged from laptop, power bank, car charger or USB socket, no additional wires are needed. About 1.5 hours of charging time can provide about 8 hours of use time (at certain light intensity settings). No need to spend money on batteries. Small and Lightweight: Small size and weight of only 37 grams, it is perfect for hanging on books for night reading, and can be fully folded to become slim and convenient to carry on planes, trains or read in the back seat of the car while driving. Flexible Lighting Angle: Fully flexible design allows the LED lens to rotate 90 degrees to the left and 45 degrees downward; 350-degree flexible mount can be folded to any angle for optimal viewing, without constantly rearranging the light. Adjustable Light Mode: Soft white light, 50%, light intensity are available, allowing you to choose the ideal reading light intensity; read in bed without disturbing your roommates. It maintains the selected light intensity level. Gift for Kids: The compact size and multiple functions make this book light a great gift for avid readers and kids who love to read everywhere. It can also be used as a bookmark or a mini flashlight when there is no electricity.