The VS-41HD is a 1U 4x1:2 HD-SDI video switcher that can switch between 4 HD-SDI video inputs and output 2 identical signals. It supports SDI and HD-SDI video standards up to 1.485Gbps and provides flexible control options including front panel, RS-232, RS-485, Ethernet, IR remote, and contact closure. The switcher features Kramer equalization and re-clocking technology to support longer cable runs and includes indicators for input signal detection.