The Cobalt Digital RM20-9433EMDE-EO-A-HDBNC is an HDBNC rear IO Transmitter module. (Standard Width) (1) 3G/HD/SD-SDI Input BNC, (1) 3G/HD/SD-SDI Output BNC, (1) Fiber Output (LC connector), (8) Balanced Analog Audio I/O, (8) Unbalanced AES I/O (coaxial; HD-BNC)