READ AT NIGHT WITHOUT DISTURBING SLEEP - Removes 99.95% of blue light, creating a warm, light-like hue perfect for use with a good book, Kindle, or e-reader. This mini reading lamp helps preserve the body's natural melatonin production. FULLY RECHARGEABLE - Our rechargeable book light is powered by a (1000mAH) lithium battery so you can read or work uninterrupted. You get 30+ hours of reading time with just 4 hours of charging. Get a good night's reading without interruption. ADJUSTABLE BRIGHTNESS - This dimmable reading book light offers 3 variable brightness settings at 25%, 50%, and 100%, 20, 40, and 80 lumens respectively. Easily adjust the brightness to your reading conditions for a comfortable reading experience. LIGHTWEIGHT AND PORTABLE - At only 70g (2.5oz), you'll barely notice the lamp is even there. Just clip it onto your e-reader, book, or laptop. This lamp can be easily stowed away for your travels. The perfect reading companion for any occasion. EXCELLENT GIFTS OR CHRISTMAS STOCKINGS - Lightweight reading lights are the perfect gifts for the bookworms in your life. Create the best package they've ever received by combining it with a book or blanket. Our lights are perfect for children and can be dimmed and used as a soft night light for a warmer, cozier atmosphere that can soothe your children into a deep, comforting sleep as effectively as a lullaby.