The reading light comes in 3 colors of white, warm white, and warm white and 30%, 60% brightness, allowing you to choose the perfect brightness to keep your eyes comfortable in bed and enjoy reading time without worrying about disturbing your roommates. Short press to switch colors, long press to switch brightness. Brightness memory function, it will maintain the brightness level you selected previously. The reading light requires no additional cables or batteries. It has built-in USB for easy charging. It can be directly plugged into a computer, mobile power supply, adapter, car charger or USB socket for charging. Charging takes 1.5 hours and can be used continuously for up to 8 hours (at brightness settings). The reading light design is completely flexible, the LED lens can be rotated 45° counterclockwise, clockwise, and downward; the 315° flexible bracket can be bent to any angle for the best effect. No need to constantly reposition lights. At 13 ounces, the reading light is compact and lightweight, perfect for clipping onto a book for night time reading, and is fully foldable and slim for easy use on airplanes, reading in the back seat of a train or car, traveling, While knitting, camping and repairing.