Comfortable and adjustable brightness: Designed with 18 LED lamps (18 lumens), which produce a natural and non-flickering light that does not damage or strain your eyes. And there are 3 lighting modes, you can easily adjust the brightness by touching the switch. Rechargeable via USB: Extraordinary battery life with 1200 mAh built-in rechargeable battery and USB charging cable. You can use the strong light for up to 3 hours when it is fully charged. The indicator light turns from red to green when it is fully charged. Portable and flexible: The book lamp has a mini format and a compact design and is very easy to carry. The robust and flexible gooseneck (360 degrees) makes it possible to place the light wherever you want. Usage: perfect for reading, working, learning, for emergencies, suitable for the study room , the office, the bedroom, the living room, the dormitory, also perfect as a night light for the baby's room.