Usage Tips:Infinitely dimmable & 3 modes: Reading lamp has three color temperature modes - cool white, warm white and mixed white (3000-6500K). And at the same time, the brightness of this LED book lamp is adjustable, so you can easily get any combination of color temperature and brightness you want. 9 LEDs & Battery indicator: Thanks to the high-quality, glare-free and flicker-free LED light source of the clip light, your eyes are protected to the highest degree when reading. And on the clamp you will see 4 indicator lights, which you can use to know the current status of the battery at any time. USB Rechargeable & Large Capacity Battery: LED book light has a built-in 1000mAH high-capacity rechargeable battery, which allows it to continuously light up for 5-7 hours in high brightness and 60 hours in low brightness. And in just two hours, you can fully charge this LED lamp with a USB cable, which is very convenient to use. Easy operation: You can enjoy all the functions of the light with just one button. Press it once to turn on the light. At this time, the light is in mixed welding mode. Press the button again to switch to cool white mode, and the third button to switch to warm white mode. The light can be turned off on the fourth press of the button. If you need to change the brightness, just press and hold the button. Slightly & Portable: Weight of Gritin LED reading lamp is light. And it is also very compact and can be bent and folded. This makes it ideal for taking away. Whether you're camping or traveling, she's the ideal companion for your late night reading.