1.3 color modes and 9 dimming levels - (switch between 50% warm white, warm white, 50% daylight, daylight, 50% cool light, cool light) to reduce eye strain while matching your environment - perfect for late night reading or focused tasks without disturbing others. 2.Flexible and Versatile Design - With a flexible gooseneck that rotates 315° and a lens that swivels 90° left/right and 45° downward, this light unparalleled adjustability. It holds its position securely without constant repositioning, perfect for any reading material or angle. 3.Ultra- and Space-Saving - The compact book light is only 4.32 inches in length and 1.8 inches in width, making it a great companion for your on-the-go reading. Its foldable design makes it small enough to fit in a bag or backpack, or fit into a paperback book as a built-in bookmark, perfect for traveling, reading on a plane, train, in the back seat of a car, or lying in bed. It's a handy companion wherever you go. 4.Fast USB-C Charging - The book light is powered by a 200mAh built-in lithium battery, which can be fully charged in 1.5 hours via USB (laptop, power bank, adapter or car charger). Once charged, it provides up to 8 hours of continuous use depending on the brightness setting. Save money on disposable batteries!