3 Color & 5 BrightnessThe book light has 3 color modes: warm light (2000k), white light (6000k), and natural light (3400k). Each lighting mode has 5 brightness adjustments (20%, 40%, 60%, 80%, and 100%). Different color temperatures and intensities can meet the needs of different scenes. The book light has a diffused design of 5 LED beads, so the light can be evenly distributed on the reading page. It is bright enough to illuminate both pages of a book without disturbing those around you. Multi-functional Book LightWith this small reading light for books in bed with a 30-minute auto-off timer, you can feel free to fall asleep while reading in bed. And it's not just a book light for reading at night in bed; it has a variety of uses. You can also use it as a bookmark, camping light, photography fill light, flashlight, night light, or even a cell phone holder. The multipurpose book lights meet your various needs. Flexible & Portable DesignThe light lens of this book reading light can be turned left, right, and downside with angles of 90, 90, and 45 respectively. The clamp of the clip-on book light can open maximally 120, allowing you to adjust the angle of the reading light to shine light in any direction you need. It is flexible enough for all book sizes. USB Rechargeable & Long LastingNo additional cables are needed. Easily charged with built-in USB, directly plug it into a computer, power bank, phone adapter, car charger, or USB outlet for recharging. This rechargeable book light has a built-in 500 mAh battery, providing 1080 reading hours (depending on your brightness setting). Product Quality GuaranteeIf you have any questions about the reading light, please feel free to contact us. We will reply to you within 24 hours. NOTE: DO NOT turn the light head hardly left or right beyond 90.