Note:\r\n\r\n 1. The power indicator shows blue when charging;\r\n\r\n it will turn off automatically when charging is finished.\r\n\r\n 2. The LED lens can only be rotated 90°.\r\n\r\nForcibly rotating more than 90° will cause the light to be damaged and never illuminated.\r\n\r\n\r\n\r\n YIMONTH USB Rechargeable Book Light\r\n\r\n 3 brightness settings\r\n\r\n With a switch button and multi-angle adjustment for optimum lighting angle;\r\n\r\neye-protection and will not bother those around you.\r\n\r\n USB Rechargeable\r\n\r\n Built-in rechargeable battery and universal USB interface, simply plug the book light into\r\n\r\nthe computer, power bank, wall outlet, adapter, car charger or other USB devices and no additional cable needed.\r\n\r\n Double as Bookmark\r\n\r\n Just turn the book light off and fold it as bookmark and go to sleep without having to get out of bed to turn off the light,\r\n\r\nalso handy to pick it up from your bedside and super practical as a flashlight.\r\n\r\n Portable & Lightweight\r\n\r\n 1.3 ounce, lightweight and small, ideal for clipping on a book when nighttime reading;\r\n\r\ncan be completely folded flat and slim, portable for reading on airplane, train, or backseat of car when travelling.