Features: Three 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% to 100%) and color temperature of the book lamp. The LED gooseneck clips can be rotated 360 and adapted to your needs. Of course, flicker-free lights in reading lights do not produce lead or mercury, which protects your eyes from light. Rechargeable LED reading lights can be charged via the USB port, which can be charged directly into a USB port. The charging time is only 60 minutes and can be used for longer than 480 minutes when fully charged. The book lamp weighs only 40 g and is therefore very easy to transport. With this lightweight design, the book lighting can be easily attached to books and magazines and is the perfect reading companion for travel and train. The reading lamp and the clamp are removable and the book light can be used as a bookmark. The bottom of the clamp is magnetic so you can attach it to any ironworks. Specification: Charging time: 1h Switch Style: Touch LED quantity: 3 pieces (white, warm, white and white) Working time: 24 hours Charging type: USB charging without cable Package Included: 1x LED Book Light / User Manual Note: Due to photo lighting problems, the color of the picture may be slightly different. Due to manual measurement, the size may have an error of 1-2cm.