It designed with a usb plug (cable length: 78.8 inches/200 centimeters). the usb ports can be used with multiple devices, such as notebooks, desktop computers, mobile power supplies, usb chargers, adapter etc. the the rgb ring light set will applied to getting rid of limitations, convenient and simple to operate. more flexibly for making up & shooting youtube, you will be able to enjoy colorful lighting colors at any time freely.