Note: 3 color change: short press to change the light color: white light, warm white and natural light to switch between them. Long press step dimming. Features: Minimum brightness level can be used as a night light without disturbing your bedmate. 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, laptop USB, mobile phone adapter, car usb and etc Flexible 360 Degree Rotatable Design with Adjustable Twist Tube -- the angle and height of the lamp head can be adjusted by depending on your needs. Super non-slip silicone pad combined with its lightweight body makes it sturdy when placed in a standing position The design of the lampshade 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 L Package includes: 1*table lamp(battery included) 1*rechargeable USB cable 1x English manual