The Fen-0003 is a Usb Power and Data Isolator. It is designed to allow transparent use for a wide variety of devices that benefit from electrical isolation and can simply be placed in-line between a Usb host and device. It integrates a high-quality, low-noise, clean isolated power supply, a robust Usb data isolator, and a Usb hub controller to auto-negotiate Usb speed. The isolator will auto-negotiate the Usb speed requirements with the host controller and device. The rugged non-conductive case protects it from abusive environments and its compact design fits well with most Usb hubs. The semi-transparent design allows two Leds to shine through, providing visual feedback of the current state.Designed in the Usa with dependable, professional-grade components.Simple in-line connection between Pc and connected device providing 2,500V of isolation for both Usb data and power.Designed to support connection to a single Usb-powered device, if isolating multiple devices, use multiple isolators. Do not connect a hub with multiple devices to a single isolator. The Fen-0003 is slightly larger than a standard Usb port, if the Usb ports are close together use a short Usb extension cable to connect them.Creates high-quality, low noise power for sensitive equipment