1.Continuously dimmable & 3 modes: reading lamp has three colour 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 desired combination of colour temperature and brightness. 2.9 LEDs & Battery Indicator: With the clip's high quality, glare-free and flicker-free LED light source, your eyes are protected to the highest extent when reading. And on the terminals you will see 4 indicator lights that allow you to determine the current status of the battery at any time. 3.USB Rechargeable & Large Capacity Battery: LED book lamp has a built-in 1000 mAh high-performance battery that allows it to continuously light up for 5-7 hours at high brightness and 80 hours at low brightness. And in just two hours, you can fully charge this LED lamp with a USB cable, which is very convenient to use. 4.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 white 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 when pressing the button fourth. When you need to change the brightness, just hold down the button. 5.Lightweight & Portable: weight of LED reading lamp is lightweight. And it is also very compact and can be bent and folded. This makes it great to take with you. Whether you are at the campsite or travelling, it is the ideal companion for your night reading.