Progressive Dimming 3 Color Modes: 9 LEDs, 3 colors, brightness settings. Press the button to select 3 different color modes: warm white (4 warm LEDs), cool white (5 white LEDs), mixed color (9 LEDs on). Long press to adjust the high low brightness of each color mode, there is always a brightness that suits you to meet your reading, working needs. Soft LED Light - Protect Your Eyes: This book light adopts a glare-free, flicker-free LED light source to maximize eye protection when reading. Bring you great comfort avoid eye fatigue. 1000 mAh USB Rechargeable Battery (with Indicator Light): The LED book light is equipped with a built-in 1000 mAh high-performance rechargeable battery, which can be used continuously for 5-7 hours at high brightness 80 hours at low brightness. You can charge it at any time with the included 1M USB data cable. There are 4 indicator lights on the terminal to help you determine the current battery status. 360° Flexible Lamp Neck Sturdy Clip: The flexible 360° silicone gooseneck allows you to adjust the light angle as needed, bringing 360° all-round lighting. The dual-purpose clip can be used alone or fixed on books, Kindle, desks, computers beds. The non-slip pads on both sides of the clip can firmly fix the object, saving you the trouble of frequent adjustments. Portable Applicable: The LED reading light weighs only about 64 grams. It is small compact, foldable, very convenient to carry. Whether you are camping or traveling, it is your ideal companion for night use.