There are 3 colors of light: by touching the switch， you can control the light color and brightness， short press to change the light color， long press to dim the brightness. 2000mAh Battery， Long Lighting Time: The wireless desk lamp has a built-in 2000mAh battery， and the desk lamp can work for about 8-10 hours after being fully charged for about 3 ，5 hours. You can charge the bulb through the USB port. EASY TO USE: Just use the touch switch to easily control the light. Short press to change the light color and turn on/off， long press to dim the brightness. Lightweight and portable: The rechargeable desk lamp is very light， thanks to the cordless design， the lamp wireless LED desktop light can be used anywhere， such as living room， bedroom， office， restaurant， bar， cafe， hotel room， dormitory， outdoor camping. ， etc. Atmospheric table lamp: beautiful appearance， different light colors and brightness can meet your multiple needs. Ideal for use in bars， cafes， restaurants and hotels.