---
title: What IS That Thing?
description: What do Wrigley Field, large white disks and Federal Signal have to do with each other?  WTTW Chicago's Geoffrey Baer answers this question from a viewer who wonders what's up with that weird object in left field. Watch the video from 6:03-7:19 to find out what IT is. Visit Federal Signal Alerting & Notification to learn more about our modulator siren.  
---

[Federal Signal News ](https://www.federalsignal.com/fs-news)

# [What IS That Thing?](https://www.federalsignal.com/fs-news/what-thing)

 Written by [Admin](https://www.federalsignal.com/fs-news/author/admin) | Jul 10, 2014 5:00:00 AM

What do Wrigley Field, large white disks and Federal Signal have to do with each other?  WTTW Chicago's Geoffrey Baer answers this question from a viewer who wonders what's up with that weird object in left field. Watch the video from 6:03-7:19 to find out what IT is. Visit [Federal Signal Alerting & Notification](http://federalsignal-staging.caxy.com/fs-alerting-and-notification) to learn more about our modulator siren.

 

[View full post](https://www.federalsignal.com/fs-news/what-thing)

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