360 Degree Rotating Battery Operated High Brightness 28 LED Eye Protection Reading Desk Lamp Clip On Light with USB Cable (White) Keyboard / Desk Light with 28 LED Bulbs High quality,Power saving, Environmental protection Convenient and practical and can adjust the lighting angle at any time 2 Power supply modes:Powered by cpmputer via USB cable or powered 3 AAA battery (battery not included).You can use it anywhere at any time . Package including:1 x lamp,1 x usb cable(Appro 1 meter length).