My guess was that it probably had a time correction feature from those British radio tower integration, but this device is from 2015 (says in the article), so probably not.
> Turns out, they found out an even more innovative time sync mechanism. When you open the UI in the browser, they quickly redirect you to "/set-time/" + Date.now(). This sets a global variable in the Node.js app responsible for "now".
Could prolly take it out of access point and attach it to your network (or one you segregated from your actual network). Set up nat, dyndns, wireshark and see what happens.
