1Flexible Gooseneck: This clip on reading light is designed with flexible gooseneck, which allows you to bend it flexibly at any angle, ideal for reading in different environment. 23 Light Modes: This clip on book light supports 3 light modes which emit soft light without flicker, shadow and glaring. It won't strain your eyes and your eyes even with prolonged use. 3USB Charging: This clip on light for book with 400mAh battery supports USB charging, and can be connected with power bank, laptop and charging adapter, etc. 4Wide Application: This book reading light with clip is small, light and portable, suitable for family, bedroom, office, dormitory, travel and camping, etc. 5Durable Material: This clip on LED book light is made of strong PVC and ABS material. Flexible design make it easy to carry and store in a backpack without taking up space.