6 Brightness Dimmable - This book light has 5 modes: The is a warm book light for reading in bed at night. Amber mode filters 99.9% blue light to protect your eyes and reduce your eye strain. It is bright enough to illuminate both pages, while it is dim enough not to disturb your sleeping partner. Flexible Design & Illuminate the Full Pages - It is flexible enough for all book sizes. You can adjust the angles freely to get comfortable lighting and for a better light coverage on books. USB Rechargeable & Long Lasting for 80+ Standard - USB rechargeable and directly lug it into your laptop, power bank, adapter, car charger, or USB outlet for recharging, no additional cables needed. The booklight was built-in 700 mAh battery provides 8 hours reading time in the highest setting, and up to 80 reading time in the lowest setting. There are 4 battery power indicator and you can tell how much power left at any time. & Portable - The small book light It's so you barely notice you have it clipped to your book. It also can free standing on a and and easily lights up workspace. it is small when folded and can be placed in a shirt or pants pocket, perfect for reading on an airplane and traveling. Light Source:LED Rated voltage:5V Rated power:5W Function:5 color temperatures + 6 levels of brightness + timed reminder book clip light 700MAH Colour:Black Material:ABS Package Contents: 1 * USB bookmark light Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.