This 20m USB Extension Cable uses built-in active electronics to extend the cable length of a USB 2.0 device by an additional 20m. This easy to use, Plug & Play solution is perfect for extending the connection of printers, scanners, cameras and more. Important notes regarding installation: This cable features an electronic repeater module at a point approximately 10m along the cable length. Please be aware of this if you plan to install the cable in trunking or conduit. The module\'s dimensions are 25 x 72 x 13mm (WxDxH). It is recommended that this extender is used with low power or self powered USB peripherals and not high power consuming devices.