Not too much to elaborate about here. A standard Monoprice XLR shell with a resistor soldered in. While it's nothing exciting, it does give me peace of mind that my lights won't decide to go all wonky at the wrong time. Another solid value from Monoprice!
It's a DMX terminator, plug it in and that's the job. I did knock it down 1 star as it just looks like a unused XLR connector complete with missing cable. Something more identifying that it is a DMX terminator would be appreciated.
I built my own DMX terminators using some discarded mic cables. However, the ends were silver and clashed with the light fixtures. These are black and inexpensive and saved me from having to make any more on my own.