?? Directly plug the USB Light into USB port of your laptop or PC. ?? No external power supply is needed, just simply turn on your laptop or PC to power your USB light; ?? Free angle twistable neck to position the fly light anywhere you wish; ??*Power saving design of LED light up to 50000 hours of usage; ?? Durable featherweight construction with compact design for easy to carry; ??*Compatible with PC or MAC ??Metal tube