Description: The USB rechargeable lamp holder has built-in USB and does not require an additional cable. Connect directly to computers, supplies, wall outlets, adapters, car chargers and more. A 1.5 lasts up to 8 hours (in the brightest settings). Small and Light: 1.3 , light and small, very suitable for book-fixed night reading. It is completely flat and can be folded thinly, which is convenient for reading in the back seats of , trains and cars. reading in bed: The 350 ° stand can be bent to any angle for best display effect. The LED lens can be rotated 90 ° counterclockwise and clockwise and 45 ° downward to completely illuminate 2 without disturbing the bed. Adjustable Brightness: Soft white light, press button to adjust 2 brightness levels (100%, 50%), without glare, no eye strain for enthusiastic readers' children You can enjoy reading. Gifts for Nerds: Small in size and versatile, this is a great gift for enthusiastic readers who want to read . Can also be used as a bookmark or mini flashlight in the event of a . Specification: Size: Approx. 11.5x5.8x2.1cm/4.52x2.28x0.82inch Material: Plastic Color: White Package Includes: 1x Reading Lights for Books(4 Pack) : 1.Please allow 1~3 cm error due to manual measurement, thanks. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thank you.