It also did not come with the mounting brackets.
I found out that the serial cable was a standardized RJ11 to DB-9 female cable which I easily had the tools and parts on hand to build (The wiring diagram can be found below). I was able to purchase one of those power supplies that have interchangeable connectors and a voltage selector off amazon that could handle the 7.5v 3.5A power needed to run the sign. I didn't come with a power cable, remote, serial cable, mounting brackets or manual. When I first received my Betabrite, I got it with no parts.
Today I wanted to share some of the things I have been doing to get my Betabrite LED Sign setup. I'm also apart of a community that has an interest in the Emergency Alert System where most of the Emergency Alert System Encoder/Decoder units had an option to output to an LED sign. I had wanted to get one for a few years after seeing similar models in store windows, at my local 911 dispatch center and at broadcast stations/studios. In February I bought a Betabrite LED Sign (AKA a ticker) for $50 off eBay without any of its accessories.