Dimmable Reading Light: The book light for reading in bed gives off the wonderful amount of light to fully illuminate both pages of the book, and it has three adjustable brightness levels (20% 50% 100%), that wouldn't be too bright to disturbing anyone, like your husband, wife, or kids_x000D_Light Weight & Flexible: The reading lights for books in bed are very lightweight but compact. It's no issues to clip it to paperbacks, hardbacks or headboard, and you won't even feel its' weight. The gooseneck bends easily to whatever position you need_x000D_Three Lighting Modes: Lepower book light has 3 lighting modes, warm light, white light and natural light. The white light would be a wonderful option for writing or finding something; it is suitable to read a book or check out the calendar under natural light mode; using the warm light serves sensitive eyes well, and in the meantime, that wouldn't keep your partner up_x000D_Adjustable Clip: The adjustable clamp offers easy grip and reaches up to 3 cm/1.18 inch (suggest clip on width of 0.8 inch/ 2 cm). With non-slippery surface, it holds securely on the book, magazine, kindle, e-reader, iPad and Mac Book, ect. Also wonderful for music stand, piano, orchestra pit and any craft table with flat surface_x000D_USB & Battery Operated: The book lamp is powered by 3 AAA batteries (not included), or using USB cable (included) connect to laptops, power bank to light it up. No need to pre-charge it before reading