LIGHTWEIGHT DESIGN: BOOKLIGHT LED READER. The 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 BookLight's LED head 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 BookLight is equipped with 5 ultra-bright LED beads that spread light evenly across the pages. The reader also has 3 color temperatures: warm light (2800K), natural light (4500K), and cool 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 e-reader can be set for half an hour to easily control reading time. The e-reader can also be used as a bookmark or a mini flashlight. Provides perfect illumination. USB CHARGING: The LED reading light 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 USB wall outlet. After 3 hours, the e-reader is fully charged and can operate for 10 to 80 hours.