Ekusoft Dimmable Usb Lamp Rechargable Eye Care Reading Desk Lamp 3 Level of Brightness Usb-powered (White) Touch sensor switch 3-Level adjustable brightness Input: DC 5V 500mA Wattages: 1.5W Brightness:600LX Power from USB Port Directly Fully charged, lamp will last 12 hours consecutively in the dimmest light; 10 hours in medium light ad 8 hours in brightest Third gear light intensity humanized design make your eyes in a comfortable environment.