6 brightness options, 3 color lighting modes: This USB rechargeable book lamp has 3 color lighting modes: white, yellow and warm white. Each color supports two brightness settings: high brightness and soft brightness, providing the most comfortable and eye-protective lighting brightness 3 - 24 hours long battery life Battery: Our Clip-on-reading light charges quickly and can be charged anywhere, anytime on any mobile device. 3 - 24 hours of cordless long-term lighting when fully charged Can be used as a necklace light: This flexible clip on book lamp can be fixed not only on the book and the table, but also on the collar with a clip for flexible lighting. Only 32G / 1.1oz per lamp, really realize unfeeling Wear, portable and easy to use Foldable and Portable Design: This LED lamp differs from traditional reading clip lamps. It features a more flexible folding design that makes the light more portable and does not take up storage space. When folded, it can be easily placed in your clothes pocket Soft lighting for a wide area: This reading light features a circular flexible lamp cap with a wide lighting area and soft illumination. Irradiated area has clear handwriting, does not affect others' rest, long-term reading does not cause eye fatigue