Note: 3 color switching: short press to switch the light color: white light, warm white light and natural light. Long press stepless dimming. Features: The book lamp, have 3 different levels of brightness and colors, which can satisfy your needs. The Minimum brightness level as a night light can be used without disturbing your bed mate. Medium and maximum brightness level is suitable for reading or studying Built-in 2000mAh Rechargeable Battery with USB interface design (without charger) --- the table lamp can be powered by USB charger, plug and play, USB laptop, mobile phone adapter, usb car and etc Easy to use with Clip Base or Stand---The reading light comes with a clip holder. The maximum clip width: 60mm, and placed on your desk or clipped to the edge when you want to read. It saves your space, protects your eyes and makes you create the feeling of fashion Flexible 360 Degree Rotatable Design with Adjustable Twist Tube -- the angle and height of the lamp head can be adjusted according to your needs. Super non-slip silicone pad combined with its lightweight body makes it sturdy when placed in a standing position With 18 LED bulbs and 2000mAh long life battery. The frosted shade design is unique. The soft light is good and healthy for your eyes because it does not flash or produce negative radiation Product parameters: Rated voltage: DC5V Battery capacity: 2000mAh lithium battery ( included) Charging time: about 5H High brightness lighting time: about 3H Low brightness lighting time: about 24H Color temperature: 3000-6000K Package included: 1*table lamp(battery included) 1*rechargeable USB cable 1xEnglish manual