[3 Color Modes & 5 Brightness Adjustments]: This clip-on book light offers 3 color temperatures: light (1600K), mixed light (4000K), and white light (6000K). light blocks 99.99% of blue light, effectively protecting your eyes from damage while reading. With 5 brightness levels to choose from, you can enjoy reading at night without disturbing anyone [30/60 Minutes Timer & Eye Care]: Compared with other reading lights, our book reading light has a 30/60 minute auto-off timer, timed reading for 30 minutes in green light mode and 60 minutes in blue light mode. It also has 9 professional eye protection LED beads that distribute light evenly across the pages without flicker, shadows or , and is designed to filter blue light. It provides soft, that 't strain your eyes, even after long hours of use. [Rechargeable Book Light]: This reading book light has a built-in 500mAh battery that is long-lasting and powerful enough to last for 8-80 hours of reading time (depending on your brightness setting). It can be directly into any USB port, such as laptops, mobile power, and adapters. Additionally, there are 4 power indicators to help you understand the real-time battery remaining status. [ & Portable Design]: When you clip it on a book, you can barely feel its weight. Its small and flexible design makes it easy to carry and put into a backpack, taking up very little space. It's perfect for reading , while traveling, on airplanes or trains, in cars, etc. [Flexible Angle & Sturdy Clamp]: The 315flexible light clip can be adjusted to the maximum angle, turning left, right, and down up to 90, 90, and 45 to meet any angle reading lighting needs. The clip angle is wide enough, very strong, and suitable for all types of books. When the clip is removed, it will not damage your books. Colour:Black Material:Plastic Package Contents: 1 * Reading Light Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.