The Gofanco KVMHDExt70 is a comprehensive extension system designed to transmit high-definition video (HDMI), USB peripheral data (keyboard, mouse), and stereo audio over a single long-run CAT6, CAT6a, or CAT7 cable up to 70 meters (approximately 230 feet). It consists of a local transmitter unit and a remote receiver unit. The transmitter connects to a source computer via HDMI and USB-A ports, capturing its video output and establishing a virtual USB hub for keyboard and mouse control. It then encodes and sends all these signals over the CATx cable. The receiver, located at the remote workspace, decodes the signals, outputting HDMI to a monitor and providing USB ports to connect the user's actual keyboard and mouse. This creates a seamless experience where the user can interact with a computer located far away as if it were right at their desk.

This system is engineered for professional and commercial environments where computers need to be centralized in server rooms, equipment closets, or secure areas while user workstations are in separate, potentially more spacious or ergonomic locations. It supports high-resolution video, typically up to 4K at 30Hz or 1080p at 60Hz, ensuring a sharp desktop image for detailed work. The integrated USB 2.0 hub functionality allows for the extension of not just HID (Human Interface Device) class peripherals like keyboards and mice, but also other compatible devices such as webcams, flash drives, or printers, though with bandwidth limitations for high-speed data transfer. The inclusion of audio embedding and de-embedding means sound from the computer can be played through speakers at the remote location.

The value of the Gofanco KVMHDExt70 lies in its ability to simplify infrastructure, improve security, and enhance workspace flexibility. By running a single, thin CAT cable instead of multiple bulky HDMI and USB cables, it reduces installation cost and complexity. It allows IT departments to secure valuable computers in locked racks while providing users with uncluttered, functional workstations. For control rooms, digital signage, labs, and offices, this extender provides a reliable, cost-effective solution for long-distance computer access, maintaining high video quality and responsive peripheral control over impressive distances.