Description: 3 light colors & dimmable brightness: The table lamp has 3 light colors: cold white of 6500K, warm white of 3000K and natural white of 4500K. With the touch switch you can control the light color and brightness, short touch to change the light color and long touch to dim the brightness. 2000mAh Battery & Long Lighting Time: The cordless table lamp is built-in 2000mAh battery, after fully charged about 4 hours, the table lamp can work about 8-10 hours. You can charge the lamp through the USB port. Easy to use: Just use the touch switch to control the table lamp easily. Short touch to change the light color and switch on/off, long touch to dim the brightness. .