CUSTOMIZE YOUR ILLUMINATION The book light for reading in bed has 3 color temperatures and 3 brightness settings. The brightest setting easily lights up 2 full pages of any size book, and the lowest one creates a private reading space for you when your partner is sleeping next to you RECHARGEABLE LONG-LASTING The built-in rechargeable battery provides 4 70 hours of even and eye-friendly light based on your brightness setting. In just 1.5 hours, you can fully charge the book light rechargeable with the included micro USB cable AMAZINGLY LIGHTWEIGHT The mini reading light is so lightweight (only 1.3 oz) that you will hardly feel the added weight when you clamp it on the book. The foldable design makes it take up very little space, just like a mouse, easy to pack for traveling WELL-DESIGNED CLAMP The led reading light clip opens about 1.2 in and offers secure grip for thin objects, which is very suitable for books, e-books, tablets, etc. The non-slip clip is also padded with soft sponge to avoid leaving marks on your book and e-book cover FLEXIBLE METAL GOOSENECK Its gooseneck is flexible so you can position the light exactly where you need it . And it is covered with metal material, which increases durability and lifespan of the book reading light and avoid the lamp head shaking during use