[1000mAh Strong Battery Life] Book Light Clip on built-in rechargeable 1000mAh with strong battery life, 1 hour charge a whole day working, since large battery capacity, the base design is a little bit heavy, suitable for clip on headboard, desk ,table or clip up to over 1 inch thick book; USB type C rechargeable is more convenient, provides you with enough power and lighting for anytime anywhere (Please Note that no adapter included). [Charging Indicator light] Book reading light has 16 evenly distributed LED lamps, 5 Brightness and 3 Color Modes, anti-reflective and flicker-free LED light that protects your eyes while reading. There has 2 indicator lights show current status of the battery when you charge, color red indicates charging, green show finish. [Adjustable Panels] The reading light has 4 Buttons, Top button is power switch, turns on and off; you can adjust the brightness through the "+" "-" buttons from the left and right sides on the light, which has 5 brightness levels adjustable from low to high, the bottom button is 3 different light modes of amber, warm and natural, you can choose your favorite modes. [Warm eye protection mode] Reading Light uses warm LED lights to protect your eyes from strong light damage, the open reading mode in a comfortable state, suitable for work, sleep and reading, perfect for bookworms, kids; camping or traveling. [Small and portable, easy to use] The weight of the book light is only 4.16 oz, size: 1.77*3.14*7 inch, which is very light; small and be bent and folded that easy to use and carry it. It's good choice for headboard, computers, desks and outdoor travel etc.