We are Green Connection Tech based in Shenzhen , China. We are member of Tradekey.com since March, 2011. Our business is related to Electrical & Electronics Supplies industry and we specifically deal in USB/HDMI/DP cable. Please find our product details below: USB 2.0 Active Extension Cable 30m with Power DC-Jack Green Connection GC-UEC30M1 is a extension cable that can be used to increase the length of a device cable upto 30m . Self-powered for USB cameras‚ printers‚ webcams‚ keyboard/mouse ect . LED indicator desgined for easy status monitoring Additional power DC-Jack is designed for devices which need much power Such as USB HDD and High power wifi networking device ‚ect . Thank you for taking the time to go through our business profile. If there are any question, inquiry or comments, please feel free to contact us.