The Micro Converter HDMI to SDI 12G 20 Pack supplies twenty of Blackmagic Design's HDMI-to-SDI converters, each built to link HDMI cameras or computers to pro-style SDI (BNC) monitors and components — several units can also be chained to extend HDMI over long distances using SDI cable. Every unit has one HDMI input and two 12G-SDI outputs, selectable to Level A or B, and auto-detects and matches the HDMI input to the SDI output up to DCI/UHD 4K60. HDMI timecode support, SDI re-clocking for long cable runs and automatic input signal detection are built in. Each converter is housed in a sturdy metal shell with rugged connectors and LED video and power indicators, and its USB Type-C port both powers the unit and enables firmware updates from a Windows or macOS computer; the pack is supplied without power supplies, so a USB-C cable and power supply are sourced separately for each unit.