Estone Flexible 7 LED Desk USB Lamp Light With Clip For Home Gift PC Laptop Notebook Directly fix the light on your screen or keyboard,and then plug the USB light into USB port of your laptop or PC. No external power supply, just simply turn on your laptop or PC, turn on the switch,it works Power saving design of LED light up to 50000 hours of usage Durable feather weight construction with compact design for easy to carry Flexible metal tube, easy to adjust direction