The DB-1-4 is a Universal DMX512 Optical Splitter. It splits the incoming DMX signal, in chain configurations, into four separate outputs with an additional "thru" port. For easy connection, the DB-1-4 has 3-pin and 5-pin XLR connectors. The unit can be installed in any 19" rack or with the M10 slot on the rear panel in the carrier. The lighting controller has clear LEDs to indicate the DMX signal status of each output and input.