Warm light to protect your eyes: With 3 adjustable brightness levels - 3000k, 4500k and 5500k, just short press to control the brightness, the book light has soft light, will protect your eyes from strong light, perfect for reading books and books electronics in bed. Portable, lightweight, beautiful: Very compact and light, it weighs only 30.5 g. It weighs like a spoon and is easy to transport. This fantastic light fixture is so portable you can take it with you. This reading light can also be used as a bookmark so you never miss a page. USB rechargeable and portable light: The clip light simply needs to be inserted into the USB port of any charger, such as a PC, USB power adapter, power bank, etc. It takes about 40 minutes to get full power and can continuously use 2-3 hours Flexible and Detachable Terminal: The flexible gooseneck allows you to adjust the light for maximum comfort. The light can be used as a bookmark when the clip is deleted. Can be connected to books of all shapes and sizes. The silicone surface protects the pages to be clamped and provides a secure grip compared to the bare neck. Widely Use: The variable and dimmable light, designed for reading books and e-books. The lamp is suitable for reading and writing at night. It can be used as a flashlight, reading lamp, bed lamp. Also, it can be used as a bookmark.