From their description on their website (http://leftronic.com/):

"Leftronic develops web-based visualization software optimized for large screen displays. Our API makes it easy - just push individual data points and our application tracks, parses and presents the data."

It looks like they provide an API for you to submit your own data, and then they make a personalized web application dashboard that you can display on a display.

We make software that drives the displays. The dashboards are fully customizable through our website. We have a simple API for collecting the data that needs to be monitored.