Warm light to protect your eyes: With 3 adjustable brightness levels to 1600k, 5500k and 2800k, just short press to control the brightness, the book light has soft light, will protect your eyes from the strong light, perfect for book and ebook reading in bed. Flexible, portable and lightweight lamp arm: The soft and skintofriendly silicone lamp arm can be folded into any position. what a shape, and the weight is light, only 180g, very small and light, convenient to carry or put on the bed. You can take this fantastic lamp with you wherever you go. The neck lamp can be used for reading books and can also be used as outdoor lighting for convenient travel. Detachable lamp head and 2 independent control centers: The lamp head is detachable , and there are two USB A ports which can be charged directly when you remove the lamp head, so no charging cable is required. Do not insert 2 USB ports at the same time The lights on both sides can be individually controlled on the switch and brightness adjustment. Large capacity battery, USB charging: Builttoin 550mAh and 550mAh battery, it takes about 80 minutes to fully charge and it can work continuously for 5to10 hours when fully charged (varies with brightness). Hanging neck reader only needs to be plugged into the USB port of any charging device, such as PC, USB power adapter, mobile power, etc. Wide Use: Flexible dimmable light, specially designed for reading books and etobooks. The lamp is suitable for reading and writing at night. Can be used as a flashlight, reading lamp, bedside lamp.