LIGHTWEIGHT DESIGN: The LED READING LAMP BookLight measures 10.5*3.5*1.6 cm and weighs only 45 grams. It folds completely flat and has a slim profile, perfect for carrying in your bag. FLEXIBLE ANGLE: The LED head of the BookLight reading lamp can be rotated 45 degrees up and down, 90 degrees left and right, and the foot clip can be rotated 120 degrees downwards to direct the light in any direction you need for an optimal reading experience. 3 COLOR TEMPERATURES AND 5 BRIGHTNESS LEVELS: The book reading lamp is equipped with 5 ultra-bright LED beads that spread the light evenly across the pages. The reading lamp also has 3 color temperatures: warm light (2800K), natural light (4500K), and white light (6000K), as well as 5 brightness levels (20%, 40%, 60%, 80%, 100%) to adapt to different reading environments. TIMER FUNCTION: The rechargeable USB reading lamp can be set for half an hour to easily control reading time. The reading lamp can also be used as a bookmark or as a mini flashlight. Provides ideal illumination. USB CHARGING: The LED reading lamp has a built-in 500 mAh battery that can be charged via the USB port. It can be charged directly via a laptop, charger, car charger, or a USB socket. After 3 hours, the reading lamp is fully charged and can operate for 10 to 80 hours.