The Usb Cable Ofinglight Is About 2m Long And Can Be Connected To A Phone Adapter (not Included) Power Supply Laptop Etc. It Is Very Convenient To Use. Dimmable Led Ringlight With A Wide Dimmingange From Level-1 To Level-10. Special Led Design Lightweight And Portable. Constant Current Drive Low Power Loss. No Ultraviolet And Infrared Lightadiation Low Heat Output Ofing Light Safety And Environmental Protection. Long Service Life Of More Than 50000hrs. Witheinforced Flexible Arm Which Will Move Freely And Never Droop. Extra Long Cord And Heavy Duty Thumb Screws. It Is Widely Applied To Outdoor Photo Light Filling Light Indoors Portrait Fashion Wedding Art Advertisement Photography Shooting Video Etc.