The FiDO-4R-MM is a quad-channel receiver that takes four simplex or two duplex LC fibre inputs and converts each to a 3G/HD/SD-SDI output. It supports 4K/UltraHD-SDI over the four fibre links, runs up to 700 m on OM4 or 300 m on OM3 multi-mode fibre, carries SDI metadata including HDR pass-through, and ships with a 5-20VDC universal power supply.