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 youRECHARGEABLE AND LONG-LASTING: The built-in rechargeable battery provides 4 – 80 hours of even and eye-friendly light based on your brightness setting. In just 1.5 hours, you can fully charge the rechargeable book light with the included micro USB cableAMAZINGLY LIGHTWEIGHT: The book reading light for bed 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 travelingWELL-DESIGNED CLAMP: The book lamp for reading in bed 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 coverFLEXIBLE 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 light clip on and avoids the lamp head shaking during use