Product Description: This clip-on book light offers 3 colour temperatures: amber light (1600K), mixed light (4000K), and white light (6000K). Amber light blocks 99.99% of blue light, protecting your eyes from damage while reading. With its 5 brightness levels to choose from, you can enjoy reading at night without disturbing anyone. This 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 has eye protection LED beads that distribute light evenly across the pages without flicker, shadows, or glare and is designed to filter blue 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. It can be charged directly into any USB port and provides soft, natural light that won't strain your eyes, even after long hours of use. This small reading light weighs only 1.37 ounces (39g). 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 at home, while travelling, on aeroplanes, on trains, in cars, etc. Product Specification: Colour: Black, Blue, White Material: ABS, PC Size: 105 x 36.5 x 15.5 mm Weight: 39g Function: Reading Lamp Charging Time: 2.5-3H Usage Time: 8-80H Battery Information: 500mAh Brightness: 5 levels Colour Temperature: 3 levels- 1600k-6000k Charging Parameters: 5V/1A Max Power: 0.6W Light Source: 9LED Package Inclusion: 1 x Reading Lamp