Dimmable BrightnessThree brightness modes: warm white, 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.Flexible DesignThe LED gooseneck clips can be rotated 360 and adjusted to your needs. Naturally flicker-free lights in reading lights produce no lead or mercury, protecting your eyes from light.Wireless ChargingRechargeable LED reading lights can be charged via the USB connector, 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 CarryThe book light weighs only 40g, making it very easy to carry. This lightweight design makes the book light easy to attach to books and magazines, making it the perfect reading companion for travel and trains.Multifunctional ClampThe reading light and the clamp 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.