About this item Variable BrightnessThree brightness modes: warm white, nature white and daylight. Press and hold the brightness switch on the back of the lamp head to adjust the brightness (0%-100%) and color temperature of the book lamp. Design flexibleThe LED gooseneck clips can be rotated 360 and adapted to your needs. Of course, the flicker-free reading lights produce no lead or mercury, which protects your eyes from light. Wireless Charging The rechargeable LED reading lights can be charged via the port USB, which can be charged directly into a USB port. The charging time is only 60 minutes and can be used for more than 480 minutes when fully charged. Easy to carry The reading light weighs only 40g and is therefore very easy to transport. With this lightweight design, the book light can be easily attached to books and magazines and is the perfect reading companion for travel and the train. Multifunctional clampThe reading light and the Clip are detachable and the book light can be used as a bookmark. The bottom of the clamp is magnetic so you can attach it to any ironwork.