Product description Color: Black Battery: lithium-ion / 300mAh Color temperature: warm light 4 brightness levels (button) Power: 5W Material: ABS plastic Color rendering index: 80 Scope of delivery: 1 * book clip light 1. Healthier eyes The book light makes reading a pleasure with the least possible effort for your eyes. The warm, amber-colored light, which is 99.95% free of blue light, promotes the production of melatonin at night and reduces eye strain. 4 levels of brightness. Click the switch to choose the brightness that is most comfortable and best protects your eyes. 2. Read at night without disturbing your partner This book lamp is super light. Just clip it to your book and create a private reading area for yourself when your partner sleeps next to you. Ideal for reading in bed at night. 3. USB rechargeable Built-in 300mAh polymer lithium battery, no additional cable required, it can be operated with a phone charger, power bank, laptop, car USB device or any standard USB charger. 4. Lightweight, portable and flexible The compact design with flexible and collapsible body makes it flexible to bend 360 . The ultra-flexible body adapts every angle to your different reading position. Use removable clips to hold it in a book, reader, clipboard, visor, etc. You can easily take this compact book lamp with you anywhere. 5. Bookmark light Don't lose your page again. These bookmark lights can be made flat and used as bookmarks. Just slide it into the book after reading it. It's more convenient next time you read on.