Features: 3 brightness levels, 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 1200mAh 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: 55mm, 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 cushion together with its lightweight body makes it sturdy when placed in a standing position Auto memory function, remember and start the working mode of the last time used. Product Parameters : Rated voltage: DC5V Battery capacity: 1200mAh lithium battery (included) Charging time: about 4H Color temperature: 6500K (cool white) Package included : 1*table lamp 1*1200mAh lithium battery(included) 1*rechargeable USB cable 1xuser manual