1、[3 Color Modes] The book lamp has 3 different modes: amber, warm and natural. The amber mode(1600K) is also eye protection mode since it is blue light blocking. The warm mode(3000K) is also novel reading mode since it brings soft and sweet feeling to you. The natural mode(5000K) simulates natural daylight in the daytime. Choose the one as you like freely. 2、[9 LEDs Dimmable and 3 Brightness Levels] The reading lamp has 9 evenly spread LED beads. No flickering and no dazzling. There are 3 brightness levels adjustable from high to low. It is bright enough for you to read. And at the same time, dim enough to not disturb others nearby. Enjoy your private reading time. 3、[Rechargeable and Long-lasting] USB charging. The built-in rechargeable 1000mAh battery provides 8 – 80 hours of powerful, non-diminishing brightness based on your brightness setting. 4 power indicators located on the panel and so you can tell how much power left at any time: no out of power anxiety any more. 4、[Steady and Lightweight] The clamp is steady and sturdy. The max opening height is 1.8 inches and it is easy to clip on up to 1 inch thick book. Flexible anti-slip pad equipped. The weight of the book light is only 100g. It is small, lightweight and compact enough to throw in your purse. 5、[Wide Ocaasions] The reading light has the 360 degree adjustable neck with multi use non-slip clip which allows you to position the light exactly where you need it, creating the perfect private reading space for you while reading in bed, in college dorm, or on a plane, train, or bus. It can also be placed on the tabletop, work surface, etc. Product use: 1000 mA polymer lithium battery White light color temperature: 5500-6000K Warm light color temperature: 3000-3200K Amber color temperature: 1200-1300K Product voltage: 4.5V Product weight: 128 grams (including packaging) Packing size: 75mm*65mm*100mm 1 * Reading Light 1 * USB Cable