This 4 way DMX Booster/distributor has one input, loop through and two electrically opto isolated outputs. Both DMX input and DMX output are provided with 3 pin XLR connectors making it universally compatible with most lighting systems. This item is ideally used for splitting the signal over a large area rather than running a chain. The box will isolate individual sub chains, making it quick and easy to protect and fix faults when they occur without the whole system failing.