There are details about them here
https://www.virginmedia.com/shop/broadband/intelligent-wifi-pods-existing-customer
including this
Our new Intelligent WiFi Pods connect to the Hub wirelessly, via the WiFi connection. They offer faster and more reliable coverage. They use cloud technology to learn how you use WiFi (where you use it, what devices you connect and the time of day you use them), and constantly update themselves to create the best conditions for your household.
Just a shame some of the links on the support pages don't work...
I'd go for 3rd party Mesh units instead such as TP Link Deco
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I know a bit about Wi-Fi, Telecoms, and TV as I used to do it for a living but I'm not perfect so don't beat me up... If you make things you make mistakes!