The M-UD is part of the Digital Forecast Bridge M Series (Micro Type Converters) and is an Up/Down/Cross Converter with SDI input that accepts SD, HD and 3G-SDI signals. Key features of this unit include selectable output formats via the easily accessible DIP switches, a composite video output for monitoring, audio mux/demux functionality, built-in mini USB and 3.5 stereo audio jack inputs. Your SDI signals can travel in any direction with this converter box.